Just want to add one thing to this. Just completed the install myself. MAKE SURE you get the smaller bladed add-in circuit and not the full sized one.. I went ahead and ordered any old add-in circuit and it was the too big one... Then i went down to Autozone to correct my mistake, and they had two different smaller add in circuits, but not the one we need. I then went to advance auto and luckily for me, they had the correct add-in circuit.. So if you've got time to wait for delivery, get the one in the link.. I was impatient and went with Prime, and it turned up being the wrong one.. Then had to search around town for the correct one.
Other than that little boo boo, it's a very simple install. I managed to completely hide all wires, just by playing with the plastics a little.
One other little tip is before you bother to cable tie everything back up, install the drawer first, leaving the side panel out.. Space is a little restrictive in there, so best have the drawer in the closed position, before deciding on a final resting location for the charger and adapter.
Also if anyone is looking for a decent Dashcam, for not a lot of money. Costco have one on special for a few more days $85. Cobra CDR840, fits nicely behind the rear view mirror, for an invisible and auto install.
Finally big thanks to the OP !!! Thanks dude, you took all the guess work out of it for us all....