These are double ended panel clips for a V2.4 or Trident Top hat made with 2020 extrusions.  These clips lock the main frame and the top hat together into a single body.

I recently updated my 2.4 to utilize an umbilical instead of the cable chains.  It works well but on taller models, the umbilical was rubbing the top panel.  So, I made a tophat using 2020 extrusions and followed the Voron design ethos to keep everything looking as stock as possible.  I wasn't interested in a hinged tophat so I need a way to lock them together.  I decided to remix the original V2.4 panel clips to be double ended.  Holds in the polycarbonate panels and locks the top hat to the main body of the printer.  Works great and looks even better.