We did years ago in prior unit, sorry no photos.
Unit was old we did not bother to trim out in the front, there was about .5 inch gap on the sides, don't remember bout the top.
We did strap down. Best I remember, and that is not so good these days
Al took metal straping material, one end went somewhere on the back of the frig, where it would not hit electric or lines, etc.
Other end was attached to floor.
Access was gained via the vent on outside of trailer, the frig vent, the one on the wall of unit.