you don't need silver solder (although it works great). Just go to Radio Shack, Walmart etc, and get a soldering iron or Gun (Guns heat quicker and work better) A roll of solder, and a can of Flux.

Twist the end of the rod in a piece of sandpaper till it's shiny, then dip it in the flux and insert it into the clevis. Apply heat to the sleeve of the clevis and add solder to the wire. (note: the flux will melt and sizzle before the solder starts to melt) once the rod has reached the right temp, the solder will melt and wick it's way into the sleeve. Let it cool, and you're ready!