Just got a 1985 gas-powered G1. It has holes for a stereo. I would like to install an amplifier/mp3 unit with speakers, but don't know how to wire it. I don't want to risk running down the battery. Do these carts have some sort of alternator/generator that recharges the battery? Any suggestions on how to wire a stereo to a gas cart? Thanks, in advance, for the help!