Spectrum 4-8-2

[Model Pike]

I have an older version of the 4-8-2 with the Board #S256x-PCB02 in the tender. I want to install a WOW 121- Steam but first I must install the appropriate motherboard. Since colour of the wire is not to NMRA DCC standards I am wondering if there is a diagram showing which wires are soldered where on the existing motherboard? Can you help?