Sorry mate I shoulda looked at yr photos again, just didn't want ya doin somethin idiotic like drillin an tappin which someone obviously with out any more clues than you was suggestin
Those round bits that hinge in half is what were talkin about, they are the rings that go around your scope tube an they have that little squared/blocky bit on their castings which has the tapped hole in it that the hexhead bolts that shoulda come with the rings go into like we said before
Get onto whoever sent you them rings an say wheres me flamin ring bolts mate!