Yes, that's the challenge, Bachmann does not use NMRA wiring color-code. 

After sleeping on it, I think I'm going to strip their PCB board and solder new ones by the code.  I'll have to trace each one with a multimeter.

I have a Bachmann 4-8-4 Bluebox with standard factory DCC; it's detailed and repainted in Greyhound scheme.  I purchased the TCS WSK-BAC-3 kit and it fits onto a custom mount inside the oil tender.  I removed Bachmann's DCC and need help with soldering the wires to TCS' decoder, any guided documentation?