Okay, so I'm an idiot. But, I'll update anyway. The green/brown combo wasn't. It was only a green wire. After I wired it up the way I thought it should be, I started cleaning up. It was then that I saw the paper from PP that told me the green wire goes to SIG on the speedo and the white wire goes to GRD on the speedo which luckily is the way I wired it. Started it up and everything seems to be operating correctly. Can't wait to get it out and calibrated. Install was a breeze. Of course I didn't have to drill a hole in the bottom of my boat either.
Lesson to all do it yourself'ers. Don't start on the Newcastles until install is almost done. Not almost started.