Thank you! They are manufactured for Cornhole boards. I bought them off Amazon. Just line up with hole and screw in 4 screws. Link below... I did by some LED strips that I plan on installing the next set. Gonna try channeling the wood on top and epoxy the strips in.
https://www.amazon.com/Blinngo-Cornhole-Standard-Backyard-Long-Lasting/dp/B01MR6KD96