I designed this mount for the Kulp K16A-B controller with a BeagleBone Green. I added the slot in the left side for a MicroSD Extension Cable.
I used M3 bolts to secure the mount to an enclosure mounting board. I used #4 x 3/8 screw to mount the controller board to mount.

• I have added a design for use with a BeagleBone Black. There is a wider cut out near the SD card extension path for a USB extension also.