>>>Jack, I would like to know more about the 1st exciter terminal. I am guessing that you are referring to the smaller red wire here and not the white?>>>
The exciter wire spade terminal to the ignition switch is not used on a 3- to 1-wire conversion. For this reason you may have to blip the engine a bit on starting so the alternator self-excites from residual magnetism. This is typical for 1-wire operation. Only the sensor wire spade terminal is connected to the alternator main battery output terminal. 15 +/- volts is unlikely to cook a battery. Jack E/NJ