Need some help on identifying LS3 hose

[flipper58]

Ok, I am all set on all connections, electrical and otherwise, on my Connect and Cruise LS3--except for this one. It comes out of the driver side of the engine, just behind the throttle body, and loops over to the passenger side. Prior to replacing the front drive assembly with a Dirty Dingo setup, it would have bolted to the passenger side front of the head. Can someone identify it for me and let me know what it does and where it should connect?
Many thanks.
Phil