Originals had pretty thick foil backing behind the reflector lens with an adhesive backing to stick to the metal tail panel. The foil appears to have been glued to the backside of the lens with a very thin bead of adhesive along the inside edges of the lens. I’ll post some pics next time i get out to the shop.

I used super glue gel to attach the foil to the back of the reflectors and some high quality waterproof double sided tape to attach the reflectors to the tail panel.

Oh, there are two different sizes of reflectors BTW. The inboard ones are taller if I recall al correctly.