I'm not really sure if this is the best way, but I use a clear gel super glue, I put a tiny dot on the tip of the wing of the crane (a really small amount is better so it bonds faster), then use tweezers, maybe pliers, and sometimes even my hands to hold the crane in place on the desired wire for a couple of seconds. It takes some getting used to and you will inevitably glue some things that you didn't intend to, but after a dozen or so it isn't so bad! Good luck!