Early Dart Headliner Install Question

I also noticed that the bare ABS panel would rattle against the sheet metal, so I covered both sides with foam, just using packaging foam, secured with Gorilla Glue (a foaming polyurethane). I also stuffed leftover headliner insulation (used Home Depot poly-cell sheet) in the cavities to absorb sound, plus stuck some sound deadener in the middle of body panels. I recall drilling maybe one hole at the top to secure the new sail panels. It looks like you drilled those screw holes. Otherwise, I used existing holes - a door panel clip in a round hole and put square plastic license-plate type holders in several square holes.