Installing Rostra Lumbar Support - How to Wire?

Hey TW, I decided to install these Rostra Lumbar Supports for my OR DCSB. I've installed everything, but now I'm at the scary part: the wiring. I've never done any wiring before so bare with me. The instructions from Rostra are not too helpful since this is a universal kit:

http://www.rostra.com/manuals/form3132F.pdf

Here is a picture of the positive wire, ground wire, and the fuse. I know I don't need to splice to the fuse box since it has a in line fuse. My question is: which wire to I splice into for the hot and ground wire? According to this guy's video:

https://youtu.be/x8ZOQpLNq68

when installing his pop and lock, he tapped into the light green for positive and blue for negative? I'm installing on the passenger side right now. Can I just ground the black wire to a nut? And are there different color wires for the driver side? If I can figure this out, I am going to do a how to for this install when I do the driver side. Thanks!