Help finding "Task Light" wiring?

[blamkin86]

Hi all - I'm interested in adding some small additional lights on the same circuit as the "Task Lights." These are the lights on the front side of the mirrors that aim forward. The switch that enables them is on the lower half of the headlight control on the left side of the driver.

 

I have literally no idea how to find the two wires (there's left and right sides controlled differently). I could go fishing through the harness from the body to the door, but I was hoping someone would point me to how to find the wires?

 

It would be best if I could find something under the hood, but I'll take cab if that's the only location.

 

Thanks in advance!