This shows the end of the pcb over the motor. You see the black and red decoder leads pushed into the pcb holes containing the track power oickup wires from the trucks. The center two unused contacts are for the headlight at this end. You would of course not use them with DCC, the white, yellow and blue wires seen, which are just taped to the pcb for now, are the power source from the decoder fo the lights. I'll probably use LED's with resistors for headlights. There are two other leads, purple and green, avaialble for other functions, I plan to use just one of them, for interior lights. While this isn't pretty, I hope it helps you.