Need help!!!

I have a 2006 COlorado Crew cab 4 cyl.

My truck did not come with the fog lights installed, but it appears as though all of the electrical is in place up to the fuse block under the hood. The fuse is there, and the switch is in the light switch cluster.
My question is...Is there a seperate wiring harness for the fog lights that connects to the fuse block? If not...where does the power come from? Is it part of the headlight harness? Can I replace this harness to include the fog light connectors?

I have not been able to find a harness for either the fog lights or headlamps anywhere on the web that would answer this question.

Thanks to anyone that can help!