XH-M299 or the pcb breakout board for the atx power supply to convert the atx power supply to a cheap bench power supply but the pcb breakout is bare and quite dangerous to work with without proper handling and isolation. Most maker's table are messy and has other 'electrical hazard' stuffs lying around waiting to short them out.

These are the frames meant to house around the atx power supply and utilises picattiny rail. There are multiple rail points so you are able to mount and fix the pcb breakout to which ever position you want to. The frame also meant to raise the atx power supply body from the ground/table so it won't touch it with other metal hazards