AEM IAT wiring

Okay, I have the GM style sensor that I am going to wiring into the AFM wires. I have found that I am suppose to use the brown and black wire. My only problem is on the AEM GM sensor wiring there are two black wires and they do not tell you which is the ground. So instead of guessing I thought I would ask.

Polarity doesn't matter. Use the Brown and Solid Gray wire from the AFM.

Sweet, thank you.