Wanted a side mount for my old Ender 3 V2 Neo as I had converted it to klipper.
Will support a case 29mm x 65mm
The side screws are M3x16
The top screw is M3x6 ( I ran out of small screws so just popped a big one in for the photo)
The mounting nuts I used for the rails were some I had lying around from the below creator:
https://www.thingiverse.com/thing:3050607
This is the case I used as I had an adafruit screen. I'm sure others will fit.