Nav V - which connection pins are power?

I'm concerned that my Nav V doesn't appear to be charging in its mount, and as part of the process of ruling out problems I want to ascertain whether the bike is providing power to it. There are 19 pairs of pins in the connector... before I get my multimeter out, does anyone know which of these pins is supposed to provide the power?

660 has the same mount.

https://www.google.com/search?q=gar...ECAsQBA&biw=1328&bih=620#imgrc=gYOwIwEFpU2U6M

Brilliant, thanks! On it...