Originally Posted by coolamber
So I was able to get this installed by reverse engineering the harness and ordering the parts from the retrofit kit that were available. I am doing a writeup of the full process including making the fiber optic MOST bus cables, where to install the fiber connections etc. The two added modules, the ULF-SBX-H and the USB hub each only have 2 connections to the car, one for power, the other for ground. The audio cable from the USB plug connects directly to the ULF-SBX-H, but a different cable is needed from the one that connects to the back of the head unit, the original has 3 wires, L, R and Gnd, the ULF one has 4, L,R,Gnd and Shield.
In the meantime if anyone has questions PM me here.
I look forward to your writeup on this, I've been wanting to add this myself for some time and plan to getting around to it in the next few months. At least until I can save up for a CIC+Combox retrofit, but then I could just use the wiring I'd retrofit in.