Feeling some frustration... I finished installing my Wolfbox and wired per
@AndyT suggestion:
Here's my Wolfbox G900 install write-up...
Ignore the dangling camera as I had not stuck it to the plastic trim yet, but you can see that it's in the same position as those who installed this camera inside the door before me. I took the top and bottom plastic trim off to access the interior. There's just one screw that holds the bottom piece (you can see the plastic plug covering the screw). All the panels pop off when you pull it straight out. The rear camera wire was zip-tied to the washer/electrical wiring harness inside. I did pass the camera wire through the rubber...
Turn the car on and the center screen is blank and the ADAS lights are all on... Wolfbox works as intended. I then unplugged both BATT and ACC and reinstalled fuses and sure enough, the center stack works and ADAS lights off, but triggered the Check Engine (could be coincidental, as I just filled my fuel tank for the first time).
Back to the drawing board to power the unit.
Any thoughts on what might be blanking out the center screen? I did swap out the 15A for the 20A factory fuse in the Wolfbox jumper lead.