Thanks TakePride and Tom,
Those two Spare wires are a great idea and easily found at the front. I phoned and emailed Mark Harrah at WRV and, even looking in the 3 places he suggested, I couldn't find the rear termination of those Spare wires. So, after about 2 hours of crawling around, I decided to find them in the big wiring loom in the storage compartment and tap into them there. That saved running the new wire all the way to the front.
Mark H sent me a drawing of how to wire the brake controller using a diode and relay (since the Vansco system relys on a negative input there is no "plus 12 volts" anywhere when you step on the brake pedal, hence the relay.)
I should be finishing up tomorrow. Again, thanks for your help. Oh, Tom, it's wire "52C"!
Mike and Mike (Michele)
2004 Alpine 34 FDDS