I've mounted my pretty much the same, also cut a small notch into the rear view mirror housing so I could feed the cables up into the head lining for a cleaner look. The rear is the same, and pretty much invisible from the outside, especially with privacy glass. One thing I did change is the power magic pro, after a few months of use, I found it was drawing more power from the battery when In parking mode, when with the cut off set at 6 hrs and 12v. My start stop barely cut in because the battery level was too low, some of the other things like engine cut off when I stop and open the door didn't work unless I had been on a long drive. I decided to change over and go for a small ups battery, this powers my dual cams for upto 10 hours, then uses the car battery when it's battery has run down. It has rapid charge when the engine is running. The cabling is pretty much the same as the PMP, I chopped the cigar connection off and used an atx cable extension so there's no bulky connections rattling about behind the glovebox. Heres my install. The ups is a T Power Plus Alpha.