This is a remix of 2 great designs.
https://www.prusaprinters.org/prints/4038-malolos-screw-less-snap-fit-raspberry-pi-3-model-b
and
https://www.prusaprinters.org/prints/974-prusa-mk3-sideboxes-for-some-tools
Needed to use my “old” Raspi3 and wanted the box to mount vertical so the USB cable fitted the top of the Einsy controller.
Used TINKERCAD to edit/combine the STLs.
The author remixed this model.