Mosquetoneamos la cuerda de escalada en la cinta exprés.

It is climbing jargon based on mosquetón (carabiner).

• mosquetonear = to clip something with a carabiner / to carabiner something
• mosquetoneamos = we clip or we carabiner-clip

In this sentence, it means we clip the climbing rope into the quickdraw.

This is not the most basic everyday Spanish verb, so learners often meet it only in climbing contexts. In general Spanish, you are more likely to see standard verbs like enganchar, sujetar, or, in climbing, often chapar.

It is first person plural: we.

It can be:

• present indicative: we clip
• preterite: we clipped

With this form, present and preterite look exactly the same for many -ear verbs in nosotros.

So:

• mosquetoneamos = we clip
• mosquetoneamos = we clipped

You tell which one it is from context. If this is a standalone instructional or descriptive sentence, learners will usually read it as present.

Because it does.

Spanish often creates verbs from nouns by adding -ear.

Here the pattern is:

• mosquetón = carabiner
• mosquetonear = to use a carabiner on something / to clip with a carabiner

This kind of formation is very common in informal or technical language. So even if you have never seen mosquetonear before, once you know mosquetón, the meaning is fairly guessable in context.

Both are possible.

• la cuerda = the rope
• la cuerda de escalada = the climbing rope

The longer version is just more specific. It tells you exactly what kind of rope it is.

Spanish often uses de + noun to classify something:

• zapatos de montaña = mountain shoes / hiking shoes
• cuerda de escalada = climbing rope
• arnés de escalada = climbing harness

So de escalada works like for climbing or climbing- in English.

Here en expresses the idea of into / onto / in the quickdraw.

So:

• mosquetonear la cuerda en la cinta exprés = to clip the rope into the quickdraw

Spanish often uses en where English uses in, into, or sometimes onto, depending on the action and context.

In climbing language, prepositions can vary a bit depending on region and speaker. You may also hear other constructions in real use, but en la cinta exprés is understandable as into the quickdraw.

In climbing, una cinta exprés is a quickdraw.

It is the piece of gear made of:

• two carabiners
• connected by a sewn sling

In Spain, cinta exprés is the normal term. English-speaking climbers usually say quickdraw.

Also note the spelling:

• exprés has an accent

That accent shows the stress: ex-PRÉS.

Because Spanish uses definite articles more often than English.

Here you have:

• la cuerda de escalada
• la cinta exprés

In English, you might sometimes say We clip rope into the quickdraw in a technical context, dropping an article. Spanish is less likely to do that here. It usually sounds more natural with the articles:

• la cuerda
• la cinta exprés

Spanish often uses the definite article when talking about specific equipment that is understood from the situation.

It is understandable, but it is definitely specialized climbing language.

A native speaker who climbs will likely understand it. Someone who does not climb may not know:

• mosquetonear
• cinta exprés

So this is not beginner everyday vocabulary. It belongs to a technical or hobby-specific register.

In real climbing Spanish in Spain, you may also hear chapar very often, for example:

• Chapamos la cuerda en la cinta exprés.

That is another common climbing verb for clipping the rope.

A rough pronunciation is:

• mos-ke-to-ne-A-mos

The stress is on a:

• mos-que-to-ne-A-mos

A few pronunciation notes for Spain Spanish:

• qu in mosquetón / mosquetoneamos sounds like a hard k
• c before e in Spain is often pronounced like th in think
• exprés is pronounced roughly eks-PRES

So cinta exprés in much of Spain sounds roughly like:

• THEEN-ta eks-PRES

But if you use a Latin American s sound instead of the Spain th sound, you will still be understood.

Yes. Spanish word order is flexible, though this version is perfectly normal.

The basic structure here is:

• Mosquetoneamos = verb
• la cuerda de escalada = direct object
• en la cinta exprés = place/resulting location

You could move things around for emphasis, for example:

• La cuerda de escalada la mosquetoneamos en la cinta exprés.

That sounds more marked and emphatic. The original sentence is the most neutral order.

The direct object is la cuerda de escalada.

That is the thing being clipped.

So:

• mosquetoneamos la cuerda de escalada
• we clip the climbing rope

And then:

• en la cinta exprés
• into the quickdraw

A useful way to see it is:

• What do we clip? → the climbing rope
• Where do we clip it? → into the quickdraw

That is why la cuerda de escalada is the direct object, while en la cinta exprés is a prepositional phrase giving the target/location.