Lots of my pendants have small bails or loops on the back to thread chain or leather through. I usually make these out of small bits of silver tube which I cut then cut in half before soldering onto the back. Sometimes (often!) the bits I cut in half are too small so they go straight into the ‘wee scrap’ bag.
Here I’ve soldered a few onto a strip of silver then cleaned and oxidised the semi-circular tops so you can clearly see the shapes.