So I got this new battery from the local Yamaha dealer, came with this wire, which I was told was to be plugged into the wiring harness and into the batt, "or else it won't properly charge" Problem is, when I got the bike it had a battery with no extra wire. So I have 2 questions. First, Do I even need this thing? (Bike was a 1980 Special) And second, where's the wire at in the harness that I need to tap into to hook this baby up if I do need it?

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