On Oct 9, 9:59*am, wrote:


Were plated brass.... *You'll need to sand them off to get some
bright metal to make up with the battery terminals.

If you can get to bright brass, the next step is to put a dab of
leadfree solder (silver-loaded is best) on the brass. It'll take
an acidic flux to make a good bond, you might want to practice
on scraps before the main event.