This is a remix of Prusa's original PSU cover with slot to hold a dual USB port to supply power to a camera (or whatever).
The 24V to 5V buck converter with USB port can be bought from Amazon (6x for £10). I bought a brand called AITRIP but there are many others selling the same thing.
You'll need to solder on wires to attach to the 24V supply available on the PSU. On the PSU the two connectors on the left are positive and the two on the right are negative. The rear two mounting holes are intended for 2mm x 4mm self-tapping screws (1.5mm diameter). The front two holes will accomodate 2mm bolts (2.2mm diameter).
I added the lettering “USB 3A” in Prusaslicer.
The author remixed this model.
Added a USB port holder to the PSU Cover.