An alternative bottom part for mounting to extrusion with two M5 BHCS screws and t-nuts. It's intended to be used with the top part from the LDO’s USB Mount Adapter design.
Here's a link to LDO’s USB Mount Adapter STLs:
https://github.com/MotorDynamicsLab/Nitehawk-SB/blob/master/STLs/usb_adapter_mount.stl
The author marked this model as their own original creation.