I was confused as far as where the board gets power from with 2 wires to motor and 2 what looks like to smoke and light. Ohm meter shows connection through mount screws on board fastner to wheels. Each svrew shows the resistance and each reads .01 ohm to rt wheel and .14 to left. They reverse when checking the other mount screws Bachkmann says i need a pcb board. Can i use existing board a just connect wires like jward says.

Trying to help cousin out. Got a new bachmann no 50712 ho usra 0-6-0 steam and light. Dcc ready. Im reading its a 8 pin decoder. From what i read more is there is a blank plug thats pulled out and a new plugged in. Im told that a sdh167d digitrax can be used with a 9 pin adapter. After opening things up i find a circuit board with 2 wires to light and 2 that go to motor. I see no blank plug to remove and plug in yet the decoder looks like its all wires to be soldered.