I wanted to use bassamantor's system to install a Mean Well LRS-350-24 power supply onto my SV06/Plus so I took his insert model and punched an M4 sized hole through the middle. It's inset far enough for either a button or cap head screw.
The author remixed this model.
This is just the insert with an M4-sized hole. Please see the original for all of the rest of the parts you'll need.