A simple cover to reduce the chance of touching the mains voltage input to my 400W 12V PSU.
Not fool proof but better than bare screws.

The are holes to take a couple of 5mm M3 flower nuts.
I only used one.
The nuts line up with existing slots on the side - others PSU may need mods.
This PSU came off ebay.
http://www.ebay.com.au/itm/200979000937