These are dust shield (side walls) for the GComp Automatic 8:2 Component / Composite Switch box, to keep the dust out of the insides.
https://castlemaniagames.com/collections/hd-retrovision/products/gretrostuff-automatic-8-2-component-composite-switch
To install it:
- Unscrew and remove the top.
- Fit the upper shield onto the stand offs. The divot goes over the LED.
- Screw the top back on.
- Unscrew the bottom. These standoffs are loose, so be careful not to lose any.
- Put the bottom shield (and any standoffs that moved) in place. The pokey outy thing goes were the USB port is.
- Put the bottom back on and screw it closed.