I have a spectrum 4-8-2 heavy mountain that I'm going to install a tsunami sound decoder in. There are (2) plugs that go from the tender to the loco. One is a (2) wire plug with red and black wires that i assume are the power from the loco wheels. The other plug is a (4) wire with a orange, lite brown, yellow and red wire. Which (2) go to the motor and which (2) are the lighting? I couldn,t find any info in the paper work that came with the loco or on the Bachmann web site. Don't want to disassemble the loco to find out. Doesn't look like a fun job. Thanks, Tim