90 Galant Where does radiator wire plug into??

I'm messing around with a galant I picked up cheap. I have 3 plugs coming from the radiator...I only have a match for two. There is a 2 pin plug come off of the passenger side that I don't see a match for. Anyone have a comparable car they could look at and enlighten me? Thanx

What type of Galant is this , and what engine.