Sorry man i don't have the jacket so i don't know excatly how you do it, but i'm pretty sure the pouch you are talking about is where you put your iPhone. Then run the cable from that inside your jacket to your collar. Look for tiny hoops along the zipper, these are on some jackets to feed the cable through to keep it in place.

Sweetest part of the Jacket, no one would even know there is a pocket to hold your Ipod. Look inside the left side for a small slit for your cord then feed the wire trough. The pocket is a velcro enclosure that runs parallel to zipper !!!