On other boats without the neutra salt switch it is marked as Accy 2.
I used it to wire blue LED lights into the bimini frame in the bridge. I used the Accy 1, marked accy in Dave's picture, to provide power to the camera I installed that lets me see the starboard side of the swim platform when I dock on that side.
The rest of your switches are wired the same as they are on the diesel version of the series.