This is a simple enclosure for 12V 3A power supply module from Aliexpress.
The board has marking: XPJ-02C
It requires 4 x M3 screws for assembly. The screws goes directly into plastic and holds fine.
With ABS I didn't have to prepare the holes. With other plastics the tapping might be required.
Prints without suports.
The author marked this model as their own original creation.