Speaker output wire location?

[carfreak3504]

Hi I'm roughly following this thread for my amp + speaker install:
http://www.sonicownersforum.com/for...adunit-but-replacing-speakers-adding-amp.html

I have the speakers installed, but I can't seem to find the cables under the head unit that he tapped into for the amp. Below are pictures of the cable that I think is it, but I can't seem to find every speaker wire on that by color. That bundle is connected into the back of the base of the headunit (behind the temp dials) along with two others. Any help as to where the speaker wire cable is located? Is it this bundle of cables? Thanks!