I made this little wall mount for the steam controller/puck
I used two command strips to attach it to the wall, if you prefer, you can add holes in your slicer to bolt it to the wall instead.
I printed mine in PETG for long term mechanical resistance.

5/11/26
Changed the design. The orginal uploaded had a flaw, the puck couldn't get a good connection with the controller and it wouldn't charge.
The V9 should correct this problem.