Mounting a eps carry to a 43x mos

I am really confused with mounting plates and screw length I almost need this to be explained like I am an idiot. I just bought an eps carry. But don’t have a clear idea of how to get it on my 43x. Will the plate the optic comes with be enough to mount it. The optic comes with 3 screws are any the right size none of them have measurements. Any help with this would really be appreciated