I have fitted a towbar and i am attempting to wire in twin electrics. there are two connectors behind the O/S rear light cluster one has 3 wires, black red yellow and the other has 4 violet yellow green and black, this connector has another connector plugged into it which only has two wires coming out, violet and yellow. anyone have any idea what these are for.

I think one goes to the central locking in the door(4wire) the 3 wire one sadly does not replicate any of the n/s lights wiring.
How did you get the 7pin cable to the light clusters?

Vehicle? Age? It matters.