> the top connector gets color X from the van-black
> the left connector gets color Y from the van-red
> the right connector gets color Z from the van-red/black (2 wires)
top to rear, left to front, right to middle.

I'll try to illustrate:

                          _
     connector     /_/  top is black wire, left is red wire, right is duoble
black/red wire.
                      /_/_/

    resistor     |_|_____________|    left is front and right is rear
connector, as mounted on my van
                   /______________/

Hope this is helpful...

Hector
1990 Carat