In that case you don't need to run it through the bellows (which is quite difficult), In the top corner of the D-pillar on thr LHS there are 2 connectors between the floor loom and the tailgate loom. The lighting runs through the 16-pin blue connector in pins 2 and 8. I would work out what pins the connector uses (positions 2 and 8 on the floor loom side will probably be empty) and add your wiring by adding these missing pins into the connector.hello
16 plate d2 r design, no camera but does have dab, sorry i thought it was the same post, i think there was a wiring diagram you posted shows it can be ran on the same circuit as the rhs light, i had hoped i could make it work without building the loom section, ive got the parts to build up a basic loom same as yours, will feed it through the boot join when i fit the new spoiler. just hoped i could activate the existing one
Pin 8 should be connected to Pin 1 of the green light unit connector (the Brown/Green wire on the existing light) and Pin 2 should be connected to Pin 2 of the light unit connector (the White/Blue wire on the existing light). The wiring in the tailgate loom is all black, so pretty difficult to work out what is what.