I have 2 flanges to be bolted with M39. But in between the 2 flanges there is a bush pin arrangement which will be inserted in the bolt holes. and then bolts are to be tighten. As bush is the main tightening edge I have selected bush top edge and bottom edge. but in that case there would be no connectivity between all 3 components. I am unsure what would be the selection for 2 edges over here. and how i could apply the bolts over here. for more clarification plz refere attached picture.