I would test it to see if it's always hot or if it comes on with the ignition, etc. Out of curiosity I'd follow the line to see where it originates from. You just might have some kind of accessory plug. It looks like a common connector, I just don't know which one.
Its a 2017 model and the connector is live and defo no female end to plug into, bizzare that its just hanging there, thought dealer mode switch plug looked bigger this is like a turn signal wire, buf everything works.
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