Pin Towing Plug Draper 7-Pin N-Type Towing Plug - Fits 12V Trailers, Caravans & Horse Boxes, Meets EU E11 Standards Draper 99668 7-pin N-type Towing Plug Connector ...
It appears that's just got +5V and +12V, if the wiring colors are yellow and red for those two wires.. The rest appear to be ground.. You could adapt a regular molex to that quite easily.. Just cut ...