Power supply switch holder

Got a (sunhokey) Prusa i3 from china. But didn't come with a switch to turn off printer, So purchased a green 4Pin rocker switch and wired it in.
The one I printed out, I had to rivet the box onto the power supply as couldn't get the nuts in there. This version I printed in nut holders, so should fix problem (or just rivet it in like I did).

I think it will fit most Chinese power supplies.
measures - 110mm x 30mm x 40mm