It looks like Port D and Port B according to the labels on those wires.
Rab is correct. I said the wrong thing below! It is B and D!
I have my radio out now while working on an unrelated mod for mine. The blue plug goes into the port above the blue/green dot. The other plug (think it was orange?) goes into the port above the yellowish dot.
Mateo I put mine together last night, took it for a test drive, and didn't look at the backup camera at all. I did this morning, but I had it plugged into C instead of D, for the camera.