I designed this to mount my mainboard (from a ctc i3 pro b) to the back of my hypercube, it also has mounts for two standard mosfet mounts. The mounting holes for the mainboard have a spacing of 72mmx93mm.
The spacing for the mosfets is 42mmx52mm.
It has also mounts for a large 120mm computer fan, the spacing between the holes is 105mm, you should use some m3 threaded rod and the fan mounting plate.
I mounted this to the top of my 2020 aluminium and had it hanging down.