I would assume port, but want to double check. Went to start her this morning and all I get is a bunch of clicking, even when battery parallel switch is on. Battery condition meter on the 32v panel shows port batteries really low when not paralleled. flip the parallel switch and it shows like the starboard but still won't start. Is there any harm in holding the switch over for a while to let the battery/alternator for the starboard engine charge up the port? UGH!