Wow you guys rock! Nailed it...
Any way to know from the diagrams if the 12v supply has constant power or only when the car is on?
I can't test it right now unfortunately as my battery is out for the moment.

If anyone is up for another challenge..
I cut off this connector from the trunk somewhere, do not remember where it went, but remember it was not connected anywhere do I deleted the wires.

Kept it out of curiosity to maybe figure out one day what it's for