Rear camera wiring connector at front

I have a Japanese import 2013 BHXEB variant. It does not have a rear view camera.
It has a 4 pin connector in the rear hatch that I presume from reading Japanese manuals for the NAV unit is for the rear view camera. My understanding is that the NSCP-W62 unit has a 4 pin camera connector that provides power for a rear camera in addition to signal.
However, I cannot find the corresponding wiring connector behind the NAV unit in the dash.
Any idea where this connector could be?
Additionally, I assume the NAV unit must be able to pick up a reverse signal from the body wiring loom somewhere else due to there only being a 4 pin setup.
Cheers,
Rob