This thing is based on Puddlefist's cover. The Anet A8 writing has been removed, and the hole for the switch has been adjusted.
The right side can be fastened on the power supply unit using the existing thread. For the left side, you must drill a 2.5mm diameter hole in the power supply in order to tap it for M3-0.25.
The switch is an IEC 60320 module, with a C13 socket and a fuse. You will also need a C14 cable.