The stock Ender 3 power supply's failed several times on me, so i changed it to the Meanwell power supply from the Ender 3 Pro and took the chance to also relocate the switch to the back of the printer.
As maybe seen in 'Thingiview' or in your Slicer, I included a small a small washer with the right thickness for top screw of the power supply.
Fusion360 File included.
--- ! not tested on Ender 3 PRO ! ---
PM Filament PLA