2000 Tranny wiring

I ended up sending my 2000 2 speed trans in to the Nesco to get it upgraded with the newer and stronger planetary gear set up and an overhaul. I had the 2 wires marked that come out of the back of the tranny, but they removed the tape that told which wire went where :roll: . There is one red and one black wire coming out the back of tranny. One of them connects to a single wire from the harness and the other connects to a double wire from the harness. Can anyone help me out? I also installed the number 7 converter and can't wait to try it out!
Thanks guys,
George Williamson