This is a power supply switch cover for Tronxy P802MA. It is mounted by just 3 screws as seen in picture. There is no need to remove original power supply module to install it. Once printed, it can be installed in 10-15 minutes. Just remove 2 screws from back of frame, mount the printed part, and re-apply the screws. 3rd screw will go on the original power supply metal plate inside the lower most hole.
While looking at STL, the mount is upside down. Print like that only.
Note: Supports are already incorporated in to the design. So select NO for supports in your slicer settings.
I selected 8mm brim to be printed for extra adhesion.
The one I printed and seen in pictures above has errors, thus the STL file looks little different from it. The uploaded STL file is corrected and perfect (v2 of the mount with no errors).
Remove all 1mm thin supports after printing gets over, and the mount is ready to use.