This is a box for a launch controller I made.
I have uploaded the .stp file so you can easily make modifications for the parts you intend to use.

The box can fit a 9v battery, or a 4 AAA battery holder as designed.

It uses a push button, a continuity LED, and a safety key.

The wiring is simple, but that's beyond the scope of this model.
I used a shorted TS 3.5mm mono plug and a matching jack for the safe key
I used a 2 prong extension cord for launch leads, so the case will fit a 2 prong panel outlet like this:
[https://www.amazon.com/dp/B09633DZZQ](https://www.amazon.com/dp/B09633DZZQ)

It uses 6 3mm brass threaded inserts, and 6 3mm flat head cap screws.