...I prefer to cut the lead off, and solder wire to wire. You can cut the lead on the switch harness and just use that, direct to the RCA lead, but then that switch is setup for use with this ignition, and would need to be modified again to be used on others. I didn't have any 700 or so mah batteries around, so I used a 4.8v 1100mah battery that I already had on mine. The mah of the pack, over 700mah or so, just affects your all up weight, so going too far overboard isn't just pointless, but affecting the weight. It would be best to go over the mah a bit, if more convenient than to go up in volts. The excess voltage is shed in the form of heat. And though Ralph's circuit is robust, what is the point in wasting the energy, and adding heat to your electronics, potentially exhausting their lifespan earlier than necessary....

Good luck! Ralph does great work, and the G62 is a wonderful engine. I think you will be happy with your choice.