Should you not be using a 13 pole or in the UK twin sockets,the lights,fog lights, indicators and brake lights are are taken from the relay loom from to either side of the rear lights .The relay will not work unless it has a +12v fused 10amp supply from the battery,But surely the wiring diagram came with the wiring kit if its not the correct kit then be very careful as its not straight forward like the old days,can bus and reversing sensors can be a minefield without the correct parts.