The stamped steel "nuts" are weird shaped, almost like a miniature hub cap for a wheel. The outer edge has a radius which would be difficult to compress,(flatten), and retain it's round shape. I have a few extra fasteners so maybe I will compress one carefully then try and attach it. What about wrapping the "studs" with cloth fabric tape as used on eletrical harnesses?
I also have a silver soldering iron, would "building up" the studs with soft "pot metal" help?