Print in PETG (or other heat-resistant plastic) with the bottom of the bottom and the top of the top on the build plate.  The top will need support material under the flats of the back legs and the entirety of the front.

Insert 2 M2.5 heat-set inserts and use 2 M2.5x12 screws to secure the top to the bottom.

I used a 2-Pin SAE connector, soldered to the RaceBox Micro board to connect it to my battery (triple-check the polarity of things)

I use velcro cable management loops passed through the arms to mount it to my passenger seat.

2024-09-22: Added Top_safetywire.stl with loops for attaching supplemental safety wire