These are instructions for the Astropixel PSI Mounts from LayerPrint Etsy Shop.
Place the Astropixel PSI Boards on the back of the PSI mounts.
Slip the locking ring over the board and mount, its a tight fit and may need some force to secure it.
Place the front PSI into the dome opening and secure with existing screw.
Repeat for the Rear PSI
That’s it, follow the Astropixel instructions to finish the wiring.