My wife life her charging lead draped over the tow ball of my car and I drove off with it. I have yanked all the wires out but they have only pulled off the spade terminals. I have opened the charge unit but don’t know which wire goes on which terminal. I have 3 main wires and 3 smaller ones (warning LED board I think). Does anyone have a picture of the inside of one showing which wire goes where or a wiring diagram. Alternatively can anyone point me in the right direction to find this info out?