A Guide for trim & relocate a GC Controller?

[KazuyaX93]

Hey Guys, I'm looking for a Guide that explain me how I can trim a Gamecube Controller for my GC Portable.
A video Tutorial like Tchays Vid-Tutorials would be great.

 

[Blargaman91]

I know this isn't all you're looking for but it shows where the signals go, directly to the IC:

Photo belongs to Ashen.