Question: what is the factory HID trigger wire?

I went to install my new 55 w HIDs to replace my stock HIDs. The kit I purchased is most ly plug and play except for the main headlight trigger wire which is meant to be plugged into a 9006 harnesses. I could simply cut off the plug for the factory trigger wire and adapt it to the aftermarket kit but I don't want to cut the harness until I'm sure which wire it's the trigger. I am thinking the main trigger wire is the one that starts outside of the black headlight cover and plugs into the back of the cover.

 

Nevermind. I figured it out and got the new HIDs installed. I'll try and get take some photos tomorrow morning on the way to work.