Hi Flap, sand the rod ends first to remove all oxides. Then nicely wind pre-tinned copper wire (SWG35 or 0.0084" diam) around the joint. Here I use a knot that keeps both wire ends nicely tucked in and helps to clamp the rod ends. Apply a couple of drops of silver brite flux around the joint. Use a 60W iron, and fill the joint with solder. I use silver-tin solder (silver brite) for better fatigue strength. Good luck..........