FireTV Box holder

I designed a mount for my FireTV Box for my Toshiba 40SL970. My TV is fixed with a Wall Mount Bracket and I remove the stand.
My box is designed, that you can push it in to the rails and fix it with 2 M4 bolts/washers.
You can take the original bolts and washers.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/01LVGXvI7aa