Following in the footsteps of Flash's Owner (Flash has a new sibling: M.T. (Mobile Trunk)
), I found a scrapyard HHR to pirate a set of connectors off of. The front right corner was the location under the hood.
On the HHR, the connector only has 7 wires in the 8 wire locations. The 8th location has a plug in it. I found a 2 wire connector set in the back left corner near the firewall to use as donor contacts and wires for the 8th spot. The scrapyard charged $5 for both sets of male/female connectors. Also, the colors used on the HHR connectors will not be the same as the wire colors used on the Solstice. This isn't a problem, it just require beings careful when matching it up.
The parts counter guy at a Buick dealership found a mechanic familiar with the connectors. He took a few minutes and added the last wire into the connector for me.
I used a wiring harness from U-Haul. It has LEDs to show that each plug connector wire works. That's a nice easy way to check out the wiring without needing a multimeter or connecting to a trailer. It also has a dirt cap for the connector when not in use.