As per the instruction sheet enclosed with the kit; I have the positive lead for the Pertronix points elimination kit attached to the positive lead of the coil. ('65 352 engine)
I've run the Pertronix ignitor for many years. They recommend full voltage to the coil/ignitor using a coil with resistance of 1.5 ohms across the terminals. I like to get a matched ignitor and coil from them so you know they are matched. They have a tech line and are very competent and understanding. There is nothing like getting it from the horse's mouth.