You should take a look at the power distribution diagram, it helped us wire ours. We took a PWM and cut off the side with the male connector, and striped those ends and wired like the diagram showed us.
EDIT:
Here is a link to the diagram.
http://www.usfirst.org/uploadedFiles...ution_RevA.pdf
You will need to cut a piece of extra PWM (we used a piece of white because that's not used here) to make the jump from the positive wire to the slot on the far side. I wish that i had the light here so that i could see the labels and tell you what goes where but alas, i don't have one. The best way for me to discribe it would be that you put your negative PWM (black) in the center of the light, and the positive(red 0 goes on one of the outsides, with a small wire running from that slot to the slot on the other side.
Hope this helps, if someone that has access to a light could post what the labels are that would probably help a lot.