Use copper paste solder to butter the back of a 5/16" brass disc, a ¼" textured copper disc, and a 3/16" silver or nickel silver disc. Place in the desired location, solder side down, and press into place on a ¾" link. Place small dots of solder on the discs and the link to press tiny discs into. A tiny silver or nickel silver disc goes on the textured copper disc, a tiny brass disc goes on the silver disc, and tiny copper discs go on the brass disc. Tiny copper discs are pressed into the solder on the link.