I don't understand. The plates I have all mount to factory nuts welded or otherwise already held in place. The engine plate has 6 I think with 2 being also used to overlap with the separate radiator/bumper connecting plate. These front 2 however are like M5 unlike the other 4 which are much larger and M8. I've never liked that and when I get around to it I'll weld in place a matching M8 set.
My plates are Rasta though.