This mount is made for Ender-3 V2 PSU(MEAN WELL LRS-350-24).
It's narrower than the original model.
Also, You can use Main switch mount and Power socket mount.
Required screws & nuts:
PSU Mount:M6x20mm 2pcs (Original screws can be used for fixing the PSU to mounts.)
Main switch mount:M5×16mm 2pcs
Male power socket mount:M5×16mm 2pcs, M3×8mm 2pcs(Countersunk screw), M3 nut 2pcs
In some cases, You will need some extension cables.