Yeah, just an old reference pic I found back when I did this.
Note: the pic is what it should look like after you do the 3 steps below...
(see green numbers in pic)
1) Swap the arms behind the #1 to the opposite caliper
2) Remove that bolt on pulley piece at #2 (not pictured), and bore out the bolt hole a couple mm's in order to be able to fit the first part of your e-brake cable through it. *careful you don't make the hole too big*
3) Enlarge the inner side of the cable hook at #3, on the arm's you swapped in step one. The GTI brake cable must have been thicker than the Vipers, because it doesn't fit as is.
(For step 3, some people had opted to shave the cable down at the ball tip. They found it easier than drilling out the inside of the cable hook I guess. That just seemed like a bad idea to me.)