If that's the case, you should probably find a dedicated circuit from the interior fuse panel below and to the left of the steering column. There are plenty of open circuits available to do the job, and the circuit will shut off when the truck is shut down eliminating battery drain.
Since I last drove it, the cameras have been unplugged until 24 hours ago. This is because, after the windshield replacement, I waited 24 hours for the 3M tape to cure before reattaching the camera to the mount and plugging it in.
So, after only 24 hours with the cameras connected, I just now measured the battery at 12.11 volts. I’m wondering whether there isn’t some other phantom draw in play.
The cameras are wired to the fuse box with one always on (for park mode) and the other only on with the ignition. As I mentioned, the camera is set to turn off park mode at the highest voltage setting (12.7 IIRC).
I’m slow charging the battery now. Once it’s topped off, I’m going to disconnect the cameras, read the voltage and then read it again in the morning.