There's not another 3-pin connector I could have confused it with behind this panel, right? I remember there being a few 3-pins, but it does have a little more slack than I would expect it to have.
Being that it took me so long to get back to this project, figuring out all of the electrical connectors again took some time.
Edit: after tracing the line, I realized it's the 2-pin connector. Doesn't look like I could confuse it with anything else and the connection is tight. Going to take the sensor off and look at it, I suppose, since it's somewhat easily accessible.