-35 F is the default display when there is no signal from the temperature sensor. The sensor is either disconnected, has a bad contact, or needs to be replaced. The sensor is located in the left side brake air duct most of the time.
If all you have is the wire, there isn't a connector I don't think... It looks like a temp probe and you push it into a hole in the brake duct. If there's not brake duct you'll have to zip tie it up somewhere... More hassle than it's worth I would think.
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