With the cap removed, you can pull the switch parts out of the metal ignition lock assembly. In this photo I've removed the white plastic rotating part of the switch from the black stationary part by gently prying between them with a screwdriver. The dark protruding portion of the white part snaps into a hole in the black part. (A later photo shows what holds them snapped together.) The grease has dried out and discolored somewhat, but this switch was still operating just fine. Note that the springs beneath the copper contacts in the rotating part are not so long as to shoot parts across the room. Each of the contacts has two prongs which fit into recesses in the plastic part.