What is this wire?

[Jakes-66-K10]

There is a yellow wire with a metal electrical connector, that is attached on the same strand as my block temperature sensor (green with large black connector). Where is this yellow wire supposed to go? It has the same slide-on connector as what looks like an electric choke connector. But I can't see on my old quadrajet that it had a spot for a wire like this (my new carb does, but I am not sure this is the wire for it)

Feel like a moron asking this... I can take pics if needed.