hey yeah thanks, amazingly while looking for a tool i found a voltmeter, was able to quickly identify the constant so solved that. then with the reverse camera i saw that the red wire which accompanies the yellow video rca input , that coonected to a cable from my HU called "back". and finally i was shown where the power cables are for the reverse lamps (in the boot/trunk), and was told (a youtube video) to not run ground to the lamp, but rather to a panel of the cars body. so after all that i got an amazing HU, If anyone is interested in a 10.1 unit woth android auto/apple carplay, check out the eonon, its current at about $200 with a 1080p reverse camera. just super happy i figured it out, i cabt stand not knowing the answer to something
