They're from ZS Racing.
Here's a pic from the inside.
http://d3d71ba2asa5oz.cloudfront.net...w-ab-sm__2.jpg

And here's the wiring schematic they gave me.
http://d3d71ba2asa5oz.cloudfront.net...mem-g2-3ew.jpg


Could I connect the ground inside the door panel or should I go outside of it for that?