kenwood using a completely different cable type for hooking the phatnoise up to the head unit so when you get your head unit installed (which you can get a wiring harness for your VW from bestbuy / Frys / Crutchfield.com for like under 20 dollars that will hook everything on your head up except for the keg cable.
Do a search in the hardware support forum (where I am moving this post because this has absolutly nothing to do with DMS hacks) for the cable pin outs.. you can order a cable if they are available or make one yourself.
Thanks!