Yet, another General Purpose 2 Parts Case - Parametric. Designed in Fusion 360, I have created this in order to fit some electronics and modules for my Prusa MK3s MMU2s Lack (type) Enclosure with Octoprint, but you can use it for any other purpose you may think of.

Print instructions

Being a parametric design, you may adapt it to your needs. Just open the file in Fusion 360, look for "Change Parameters" and amend the data as you wish.
Personally, I have printed it using Prusa PETG and just used 4 bolts M3 size. Depending on the length of the bolts you have available, you may need to use a drill, on the top side, in order to allow smaller lengths of M3.
For printing, I have used the textured sheet, 60% infill for the bottom part and 40% for the top part. Also, for the top part I have used modifiers in Prusa Slicer to get some ventilation inside the case. The squared hole in one of the laterals of the Top part is used to allow cables to be inserted easily.