Soldato
Thanks mate I did think it was some sort of locating standoff but just wanted to be sure.Sometimes cases have a central standoff that acts as a guide pin only, they might be those.
You don’t install a screw into it, you merely install it in the central standoff position and use it to line up the motherboard, it’ll fit in the central hole on the. Then you just install all the other screws. Just makes it easier to line it all up