If you are referring to the torch firing wires, green and black, it doesn’t matter which wire goes to which color on the Langmuir torch fire cable. All it is is closing a circuit. If you are referring to the voltage divider card, those are also red and black coming from the Langmuir cable, but the red goes to the black and the black goes to the white of the CPC. I hope this makes sense. It has to do with the fact that torch is negative on a plasma and work clamp is positive…