I found this link on Raymarine
Pin Out: a/c/e/gS-Series Power/NMEA 0183/Video Input Cable - Raymarine Technical Forum
Since neither the cable or the connection in the MFD has numbers I feel a bit uncertain about this specs. I guess that we are looking into the contact of the cable on the Raymarine
page, if it is so the + should be the left pin when looking into the connector at the back of the MFD?