Engaging the Think Tank-"cloth" headliner into a '72 Duster.

My 72 Dart was a late year production vehicle and the factory had already switched over to the cardboard when mine was produced. I too decided to put a cloth headliner in. Mine has holes for the front 3 bows but not the rear 2 bows. I have the same flat stamped, blank areas as your photos in those back two positions. I’m going to have to find one in a junkyard and take some measurements to locate those rear bows. Maybe a member here will be able to offer you measurements from their Duster or Demon