These are brackets to mount both the gscartsw and gscartsw_lite SCART switches (by superg) vertically to a panel. There are six brackets that mount to the screw posts where there is a screw collar installed as a spacer between the PCB and the bottom acrylic. Remove the screw, remove the collar, insert the bracket, and reinstall the screw. Now you have mounting points to put screws through to mount the switch vertically to clean up your video setup.
The mounting screw countersinks are designed to be used with #6 wood screws.
I also designed a gcompsw version of this bracket, check my other projects.