Ok, update, some answers (in post #2), and another question (in post #3).
1) After more searching around here I went back and found the black wire (ground). I also soldered the snip in the purple wire (fuel level). The thing that had me stumped was why I had a gray wire rather than a tan/striped one. Turns out it's the wrong year and I had managed to find only posts by people with older camaros in my searches.
2) Lifting more carpet up, these go into the bigger conduit at the base of the door, and come out in front of the door to the left of the driver's feet in a big bundle. They eventually go through the firewall (with sadly another same colored grey wire) to the relays. Unlike mine they *should* be right in front of the windshield. There is one for the fuel pump (5 wires) and one for the ?fans? (4 wires). A useful wiring diagram can be found here:
http://www.austinthirdgen.org/mkport...ta_sensors.jpg
In my case, the orange power wire was disconnected, so off to find the other end of that, which is sitting (cut off) by the battery.