The three stainless #10-24 cap head bolts on the bottom of the case thread into the bottom of the three aluminum
uprights of the board to hold it in the case.
I put some feet on the bottom of the case, bolting them through the holes of the corner protectors into flat threaded
washers (that were part of the stock case to hold the rack rails in) on the inside after drilling the rivets out.
I also bolted aluminum handles to the sides of the case. I don't really care for the way they look on there, but it was
function over looks on this one.
They're handy when the lid is separated from the board for ease of picking it up.