Ikea Micke desk insert for holding a lamp and 22mm socket adaptors.
I used this USB-C panel mount socket. Unfortunately the included nut was too big to fit into the underside of the holder so I printed a smaller one. (See UsbCPanelMountSocket_nut files)
Included is also an adaptor to mount a 12mm push button (like this one) in one of the openings. Use the button and its nut to clamp the holder (red) between two adaptor pieces (green), as shown here:
The author marked this model as their own original creation.