I just made it to hide a Shelly 2.5 controller and wires. I use it on top of my roller window shades and works like a charm :)

Use the inner platform to place the wires below and the small clips to attach the Shelly in.

In the first version (the pics attached to this design), the platform was a bit low and the wires piece almost didn't fit, had to cut the little cylinders where the screws are placed, but it's now fixed and it should be placed below without any problem.

Have fun!