I just bought a 2020 Mini Cooper S F55 that i'm adding blind spot detection system. I cannot figure out what color wires are for the left and right trigger. Backup light color is necessary too. All I know is that the solid brown is ground. I used a volt meter and only got millivolts on each wire with the directional on..

I've attached a photo of the left connector. Please assist before I cut the wrong cables. Thank you.