This is a wall mount for generic holes in your device: routers, APs, TV-boxes, and so on…
Just print the mount, stick it to a surface using double sided tape and slide your device.
I used it to mount a Fritzbox 7362 SL to the back of my TV.
Printing:
Some organic supports work fine and come out really easy.
The author remixed this model.
Instead of printing an additional bracket, you can use this version with double sided tape.