Currently trying to figure this out too. I installed a CBI Rear Bumper/Tire Swing and have the same issue. Main issue here are the connectors Toyota is using for these new cameras. There is a connection that can be possibly used behind the head liner in the top right corner where it meets the D pillar trim (if you're looking from behind the car) It appears to be a JAE MX4 connector however you can't source these to make a harness. I have sourced a few cables to reverse engineer a solution from ggoffroad.com, they make a harness with these connectors for the new gen Tundra/Tacoma. Just started messing with it today but haven't had any luck to get it to work. I also have 3D printed a simple mount with VHB to mount underneath the third brake light. Maybe with some help on here this can be figured out.