pioneer avic-f10bt rca connector pins

[mr.turtle]

Prob a long shot, but would anyone happen to know what 2 pins are the rear view camera input on the RCA multi plug on these units? I believe the f20bt, f30bt, f40bt are pretty much the same unit with upgraded software. It's the brown RCA plug.

I didn't need the connector that has all the Rca's on it originally so have lost the cable.

Think I can butcher another cable I have to do the job but need to know which pins I need to connect to on the unit itself for the rear view.

Thanks for any help at all!