Ok, comparing your info to what I have here, it looks like Scosche corrected whatever they had been screwing up, because the ACC (labeled "IGNITION SWITCHED 12V+) on the scosche adapter is in the correct location.
Right next to that on the Scosche harness is a green/white cable, which by referencing the wiring schematics provided in
this other thread, matches up with the factory blue/silver wire, which is the car speed signal input. So - the AVIC pink lead connects to the Scosche green/white lead, which has the bonus of not having to splice into the factory wire at all! I'm liking the Scosche connector more all the time!
Continuing with the remaining mysterious leads on the Scosche harness, the orange/black is the empty slot on the Metra. It's apparently "illumination negative" according to the aforementioned thread, but apparently not used in this case.
Finally, below the ACC lead on the Scosche harness (where you drew the 6 small squares) are the Black/White, Pink, and Brown leads. The other thread refers to them as "LET" "TEL" and "SECU". I'm assuming these guys aren't used either, so I'll seal those guys off as well.
So - the only question I have remaining, the "Reverse Gear Signal Input" purple/white lead from the black AVIC harness. Where does that go?