I already have the front camera installed (of course that's easy). However, if I'll be installing the rear camera on my own, I need to look for a DIY how-to when it comes to placing the wires/cables through the lining. Is there a manual where I can find this? Or perhaps, a generic how to on how do remove the linings (on the door)? I already tried looking for this on Youtube but I believe my car model is too old or maybe I'm searching for the wrong keywords.

As for the rearview camera, where is the best area to place it on a Honda CRV 2003 model? Do I need to drill a hole or something?

Lastly, my dashcam gets its power through my powerbank. Will there be an issue if the rear view camera is also connected considering it gets enabled when the reverse light becomes active (which is then connected to the car's battery)?

Thanks in advance!