Rabbit Damage - what wire is this?

[Traveler31]

Rabbit got into the engine bay over the winter and had a feast. Most cut wires/vacuum lines reconnected now, but car barely starts and dies suddenly - will not drive as RPM way too low and rough... surges a bit like only half of the cylinders are getting fuel. Reached behind air intake manifold and found another wire that was cut... but not sure what it goes to. Hoping not to remove intake manifold if I can just splice it, but I can't find the other end. I believe the wire clips into the firewall side of the air intake manifold (toward the drivers side). See picture below (not mine - from a video)... the wire circled is the one in question. That piece is intact, and the piece that clips into the connector in the image is cut about 8 inches beyond the connector. What does that half go to (the half that isn't in the picture below)? The half in the picture below is inside some rubber-like tubing, where the other half had some of the corrugated plastic protector wrap. Looks to be a larger gage stranded wire (16? 14?) - only 2 wires total, but inside a one piece molded plastic insulation (with corrugated plastic on top of that). I can get a picture of the connector on Monday.

I have repaired 2 vacuum lines, an ABS sensor, and O2 sensor, and all spark plug wires.... hoping this is the last piece that is keeping it from running.

 

[Traveler31]

Figured it out - that clips into the connector tied to the knock sensor. You need to remove the air intake manifold to be able to see the knock sensor clearly.