Should this connected to something?

[Ndawg12]

So many questions arose from just pulling the plenum. Anyone know what this connector is for?

http://i988.photobucket.com/albums/af5/ndawg12/Mobile%20Uploads/20140906_004435_zpsok33e6ne.jpg

[Engine Nut]

Looks like an Oxygen sensor plug. Your engine is a 2007 model so there are only 2 Oxygen sensors ... one on each exhaust manifold in front of the catalyst.

[Ndawg12]

Looks like an Oxygen sensor plug. Your engine is a 2007 model so there are only 2 Oxygen sensors ... one on each exhaust manifold in front of the catalyst.

I thought only the monsoon had cats in 07...? Pretty sure I dont.

[Baddog]

Just start shoving random wires in there unitl something either starts working that wasn't or you see lots of smoke and some sparks.

[built2rev]

I am going to have to guess that the engine wiring harness with fit multiple engines. So if you had the Monsoon you would have cats and then it would use those connectors.