I do not know if the covers differ between the base Ender 3 and the Pro, or if different hardware was used for the original model, but my original screws for the X-stop switch were too long and went through the face of the stepper cover.
I thickened the cover to allow using the screws that came with my Ender 3 Pro.
You need to flip the X-stop to attach it to this stepper cover (the side of the X-stop PCB that has the micro switch and the plug face away from the hexagon-side of the stepper cover).
Printed in PLA:
0.4mm nozzle
0.2mm layer height
15% gyroid infill
2 walls
3 top/bottom layers
The author remixed this model.
Made it thicker to use original hardware