Found my dads original 1971 duster!

Hey guys. Update: im taking the cluster to Mr Heater box, where the make the printed circuits on wed. They are going to test everything and get it all fixed up. They are also going to add LED lights and convert it to solid state. Question. I’ve googled and can’t find any on info on this : my car has the rear blower fan in the speaker hole and the slot that allows the air to defrost the back glass. I’m just trying to figure out what trim pieces go on top of the hardboard back dash area. There are no pre marked cutouts in the hardboard or anything. I think you put jute, then the hardboard. But there must be a grill or trim pieces that go on top afterwards?? Looks like the fake car builder kept mine