I need your help. I am doing a retrofit of the type c ports I had the type A. I have all sorted expect the wiring. On old usb A the were just two wires now I have 4 for the two type c ports. My issue is I know the go into the green connector in the quadlock. But which wire goes where? Please help me. The are two grey and two brown. Grey is live and brown is earth am I right?