[ebeltect]

So I just got my car back from some transmission repair and top end work and noticed this white wire (circled in red) just laying on the back of my fan shroud. I'm wondering what it is, what does it plug into, and where does it mount.

The attached photo is from when the engine was still out and shows the entire wire. I can't read the part number in the photo and of course now it's covered up. Thanks in advance!