New stereo, yes. And I know what all the wires are for that one.
I checked again. Definitely two black wires. I can see where one is grounded so I'm going to use that one as a ground and scrap the other black one. It goes back a ways and connects to two green and black wires anyhow. I'm guessing this is not the stock configuration.
I can't stand waiting so I'm gonna go try it even though it's dark... brb.