I bought the same unit you're using. Just want to make sure I understand this right before I start cutting:
At the harness:
Splice Green converter wire to right turn on bike
Splice Yellow converter wire to left turn on bike
White converter wire = Ground
Splice Brown converter wire to tail light on bike
Splice Red converter wire to Brake Light
Then on the other side of the converter, wire the brown to both tail lights, and the green and yellow to their respective sides (left and right), white to ground.
Please correct me if I've jammed this all up...