Let me do some looking at the bookmarks on my laptop (I'm on my phone right now) I've got a bunch from the vanagon guys that have how to cut back most of your harness. You might just look up the yahoo group on tdi vanagons incase I'm too slow. They have a lot of pdf's on it. Also google the 'volkswagen online technical resource center'. Its a russian site that has tons of wiring diagrams and even some scanned in bentleys.
I just did basically the same thing last week to my rabbit with a mk3 harness.