Frazzled

Good suggestions! Thanks.

New member here. Hope the group can help! I own a 2005 RX 330. I have purchased a bluetooth backup cam (DoHonest HD rear/front cam & monitor). It can function wirelessly with the power tied into the backup lights, or a wire can be run to a power source in the cigarette lighter. I've taken off the 2 panels inside the lift gate and it's not obvious which wire i should use. I can't find a tutorial for my model anywhere online. I tried to drill a hole above the license plate in order to install it with the wire, but I guess I don't have the right drill bits for the metal. I can't figure out any other access holes that I can use. The most significant thing is that the wire has this wide/flat part just before the four pin connector measuring about 3mm x 9mm that has to also pass though the hole. It's a car that I bought for $1500 so I'm not afraid to do something unconventional, but would prefer that it didn't negatively impact resale. I will be doing this myself and alone. I would appreciate suggestions which adhere to those parameters, especially video links solving this problem with the same or similar model. Thanks for playing, and forgive me if I've overlooked a duplicate thread.