I have a 2006, which I installed a rear and side cameras on. Mine is mounted on the rear cap just below the center clearance light. Several attempts to get the wire snake, behind the cap and down the inside of the cap to the corner, no luck.
My kitchen is in the rear, there are cabinets above the sink. So, this is how I got the wire to run where I needed it to go. Mounted the camera on the cap. Drill the hole for the wire. On the inside of the RV, inside the cabinet above the sink, I cut a small square access hole. I was able to get the wire from the camera. Then on the side of cabinet where I wanted the wire to run down under the cap, I cut another access hole.
After cutting that hole, I found out there was part of the frame that was blocking me from running the wire the original way.I attached a string to the wire snake and started it down the access hole. I had help at this time to let me know when to snake made it through.
Tied up the camera cable to the string and pulled it down through the cap. From there the cable is tucked up under the trailer to the front compartment.
My camera is powered through the camera cable. Which is connected to the two side cameras in the front compartment. From there a pigtail to the truck, wired to the duplexed behind the back seat.
Yes, I have holes in my cabinet, but you can not see them. I just put the piece I cut out, back up with some duck tape.
My cameras have a 3 foot cable that is connected to them with a screw on connection. That gets connected to the extension cable the runs to the front compartment. The extra cable from the camera is just rolled up and sits in the cabinet above the sink.
Now running the cable, the way you want to, another thought. How long is the cable coming off your camera?
I left the camera to cable extension connection up in the cabinet. Glad I did as the original camera had a malfunction and had to be replaced. Easy fix with the connection being in the cabinet. Just had to pull the old camera off, run the cable in and hook it back up.
Can the original camera be removed? If so just put the new one there. If you can not get a wire down under the cap, run it inside the cabinet, to the side and out the bottom of the cabinet. Down the corner and out the bottom. You could cover it with some channel cover for cable, something like this
https://www.amazon.com/One-Cord-Chan...ler-Management
Hopefully this helps you.