What connections for phatnoise for a b5 a4?

it plugs directly into your trunk cable (round 13 pin din cable) that came with your Audi (as long as it's 2002 or older). See my link below to my other mods for my pbox install; lots of info and part# and links to pinouts via that post of mine.

Other than that, I'm not sure if I've answered you question.....as you asked a pretty general question.

Good luck!

i made my RNS-E harness / makeing so i dont have a direct adapter i think i have most of the pins figured out just not the power and ground to the phatnoise