I can say with 100% certainty that this IS a factory stock wire. I've owned my bike since new, with no modifications and the tank wasn't replaced with the infamous service bulletin (mine never dripped requiring a trip to the dealer).
My VIN ends with ZA50140. I've been told that it was the 140th to roll off the line for US market, manufactured in April of 1997. I haven't verified that myself, but you can.
I opened up the fairings just now, and took a picture for you. This wasn't connected for me either.