1984 190e 2.3

New to mercedes. Was trying to figure out an overheating issue with the fan not coming on. Reached behind the fan somewhere to unplug this wire and the dang connector snapped off. I can't locate where it snapped off from. I'm stuck taking everything apart to find the still installed part of the connector. It seems that no hex wrench will fit the hex 4 bolts in the fan clutch. Any one know where this wire goes to and what it's for?

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