So if the new ones don't have cut outs for the usual studs how were the original ones retained? (A genuine question as it is over thirty years since I worked on a beetle.)These are flat and currently don’t have holes,I can’t cut holes now as that will break thru to the fabric on the visible side.View attachment 290424

They will require a slot cut in the hardboard surely (shouldn’t call you shirley lol).
Having just received replacements (see today’s episode of “today I acquired “),I’d like to secure them with a secret fastner.
They’re very flat and made of hardboard,what’s recommended?
I daren't drill a hole, for fear of bursting thru the fabric.






