Just curious, but when you said "no," did you have any facts when you said that?
Pin 6 on the C240A (24-pin factory connector) is the reverse lamp input pin.
Pin 11 on the C240B (16-pin factory connector) is the microphone + input pin (for voice commands).
Pin 12 on the C240B (16-pin factory connector) is the microphone - input pin (for voice commands).
I should have the video inputs and the rest of the unused pin functions when I look at the rest of the schematics, since there are seven more unused pins on the 24-pin connector and three more on the 16-pin connector.
Nice guess,