When I did the original hard wire install (I'm the original poster) I did not have any schematics - just probed the wires until I could find one that was hot (powered) at the right time (ignition on). For both my Zippster and my wifes's 335 that appropriate power line was the green/white line. Maybe the wires are different for different models or configurations. Recommend you check out the voltages and use the one that works best.
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