Hello all, really need some help here. I'm hooking up a boat trailer to the 2012 LR2 and I must splice the four colored wires in the wiring kit (green, brown, yellow and white) into the vehicle tail light wires. I cannot find info on which vehicle harness wires I splice into. There are 6 wires there of different colors (purple w/green stripe, gray w/orange stripe, brown w/green stripe, green w/white stripe, gray w/brown stripe, and heavier gauge black w/gray stripe). All I need is to identify the vehicle tail light harness wire colors to functions and I can do the rest. Many, many thanks!