Bongo Fury

We have a rear kitchen converted bongo that I've been considering fitting a small tv in, I've been considering the flip down style until someone mentioned in passing that it may be an option to use the upper most socket for a rear seat belt as a fixing point for the a TV bracket.

As the kitchen isn't going anywhere and the seat belts are out this is certainly a possibility for me. Has anyone successfully done this or any idea how I might go about it?

I've been looking into TV options and have tried a few things. I've now ditched the true TV idea and have decided to use a windows 10, 10" tablet instead. Primary mounting point will be the drivers headrest. The reason I've gone this way are:

10" screen very small form factor, very portable.
In built battery for tent use.
Usable while driving for the rear passengers (kids).
Supports all the latest tech for streaming (Amazon, Netflix, Sky Go etc).
Cheaper than a TV.
Can be moved into a tent easily.
Runs Terrestrial via PC TV USB stick.
In built storage for Movies easy to add more.
Touch screen so losing the remote isn't a problem.