I don't know if you have an auto or manual transmission, but here are some pics from my auto. I think this can at least give you an ide on where to start.
Here is the pannel under the cup holder removed. Nitice the gold covered cap. This is what you want to pry off to expose a nipple.
Here's the nipple exposed (sorry to disappoint what you might have expected
(ehh... what the heck- continue the metaphor) Put your hose on the nipple.
Run the new extended breather whereever you want. I ran mine up under the hood near the power distribution box. Replace the access pannel.
I hope this helps you with the transmission at least. Like I said, this is for an auto; a manual trans might be different.