Well I ordered a bunch of stuff and two of them were a new loco and a MRC decoder. The Athearn comes with a DCC ready 8 pin plug and the decoder(AD370) comes with a 9 pin plug. Now the directions do not really say how to put them together. Do I need to solider the wiring harness that came with the decoder in the loco or is there a way to hook up the 8 pin and the nine pin? Thanks. Dru.