One wire of the relay goes to ground (usually the relay frame itself), and the other wire goes to power, usually one terminal of the brushplate.
If the wire going to the brushplate is broken at the coil, you may be able to peel away the insulating paper and find the end. Uncoil enough to make the connection to the brushplate. You will need to remove the shellac insulation from the end of the wire in order to be able to solder it. Use a piece of fine emery cloth or sandpaper.
Larry
