I created this so I could mount an HP DPS-600PB power supply on my Anet A8 as a replacement for the stock power supply.
The resulting print will fit rather loosely around the supply - this is on purpose. I used some pieces of thin (1.5mm) craft foam (neoprene?) wedged between the power supply and the mount to avoid vibrations.
The top mount is installed upside down from the way it prints - i.e. the mounting "ears" are on the bottom.
I have two short (~10cm) pairs of 14AWG silicone wires soldered directly to the output blades of the power supply - spread the blade, insert the wire strands between the blades, add plenty of solder, heat shrink over the whole thing. Then each pair goes to an Anderson PowerPole connector pair. I use one pair to power the printer motherboard and the other pair goes to the external MOSFETs for the bed and hot end. XT60 connectors would work just as well as the PowerPoles, and you could just run a single 12AWG wire across to the electronics if you like.