Screen drop bumpers

So with a roll bar added I want to fold my screen for trials. I’ve got the bumpers in the massive spares box. So it’s just a couple of nut serts into the frame. But the question is where do they sit? There are a couple of kinda witness marks in the pressing but they don’t align to the feet on the bumpers. 

They may as well go in the right place…. So does any one have a dimension?