https://www.rearviewsafety.com/media...in-badge_2.jpg
Click on the link above. This what put on my 2013 Montana FB3900. I mounted it high on the back cap. Snaked the wire through using fishing tape and utilizing the mark light openings. Then down the cap along the right side underneath the bottom of the trailer, up through the propane compartment and out just above the hitch. Then I mounted the monitor on the dashboard of my truck, underneath and out through a fender opening that had a plastic cap on it. Also, when the trailer it not connected, I have a camera mounted on my tailgate on top of the handle. This assists backing up when there is no trailer. The monitor can feed 2 cameras by switch between "V1 and V2".
I use this camera to monitor vehicles passing or me passing them. The camera lends a view so that you know when it is clear to make a lane change.
BTW, I bought my at Costco for a lot less than the site above.