ballast resistor wiring info needed

66 Buick skylark 340 engine I need to wire in a ceramic ballast resistor. It has two terminals on it. The car originally came with just the resistance wire, but it's not there anymore. It has a stock points distributor. The coil says to use an external ballast resistor. Correct me if I'm wrong, but this is the way I think it should go. On the negative terminal of the coil should go the wire from the distributor. On the positive terminal of the coil should go the wire from the starter solenoid. Also on this terminal should go a wire that connects the ballast resistor to a 12 volt source which should be on the ignition switch. Let me know if this is right so far, but I still have a problem. I'm too stupid to figure out how to put the wire in the ignition switch. I thought that when I pulled the ign. switch out of the dash that I would see prongs on which to attach the wires. Instead there is a dark brown plastic piece that the wires go through and it is connected to the metal part of the switch. I'm afraid that if I try to pull it apart, I will break it. Is there another place that I can connect a ballast resistor wire to. Battery? Voltage regulator? Fuse panel? Please be very specific. And thank you for any help.