I got myself mini keyboard with three keys and rotating encoder . Idea was to use it to control sound volume and media player on my PC without need to open applications. Keyboard was supposed to be mounted under desk table within hand reach. So I had to do mount for it.
Keyboard has USB-C connector on the top which is awkward for connecting cable. I had one angled USB-C male to female adapter so I used it to redirect cable connection.
As keyboard has double glue tape on the bottom it can be simply glued to the mount but I decided to use screws instead. I like when things can be easily disassembled if necessary. Glue does not fit in that perspective.
On the back of the holder there are holes for two zip ties. They are optional and can be used to attach USB cable to the holder to have tidy cabling under table.
I made it available for others, if they need it:
https://www.thingiverse.com/thing:6263171
https://www.printables.com/model/613586-under-desktable-holder-for-3×1-usb-mini-macro-keyb