I needed alligator clips to connected some wires from a heater to the terminals of a power source but didn’t have any. The solution I came up with was to solder small metal binder clips on the ends of the wires instead.
To prepare the binder clip, I scrubbed the bottom, nearly flat side with steel wool and applied flux to the surface. I wetted the entire bottom of the cleaned surface with solder. I also pre-tinned the wired. Connecting the two went smoothly, simply heating both simultaneously with the iron until the solder melted on both and merged to a single junction. I’m really happy with this solution since I rarely have alligator clips handy whereas the opposite is true of binder clips.