Hey guys, having a hard time finding this ground, what is the exact bolt it is hooked up to? I took out the rear drivers side seat and saw nothing thanks!

 

If you are using the stock harness that goes thru the hump in behind the rear seat backrest then it usually grounds to the floor where the bottom of the driver rear seat bolt is. if its not there trace the black wire and see where it goes or make your own as that what I did