We have a 2017 16 front bath. We included the television in our order from Scamp and they mounted ours on an adjustable (I believe RCA brand) mount. It is secured to the corner through the wall with two rivets and snap caps. (looks just like the photo in the other post)
Scamp included a 12 volt plug-in just behind the television as well as a 110v outlet AND cable connection+power antenna on/off adjacent to the outlet. Both of these are contained in the upper cabinet. They did a nice install job. The power antenna is ahead of our rooftop a/c unit and has an inside control through the roof and allows you to adjust the direction of the antenna with an included signal strength LED lights
Ok, enough about what they did include. What they didn't take into account is the television on that adjustable mount will bounce. I would find it extended outward and could easily bang around. To prevent this I created a Velcro 1-inch strap. This is suspended between the side and rear windows
having used Velcro on the window frames. So when we travel the television is in the corner and can't move outward which has worked really well.
Believe me I took the mount off the wall and tried to tighten adjust and otherwise see if the thing was put together wrong. All to no avail and decided it was a household item that wasn't really designed for an RV. Thus the Velcro strap.
Don't get me wrong the television works fine, the mount onto that back corner is strong and I'm now happy with the extra security I added to keep it in one place. The extra two rivets would have been nice to avoid but hanging extra weight
from the overhead cabinet wouldn't be my choice either.