Right now there's just a pair of group 24s in battery boxes in the forward part of the lazarette on the starboard side of the cockpit.
Anchor's stored in there, too. Since, when we start to cruise, I'm going to want a second, heavier anchor in there, and I'll want at least a pair of group 27 batteries for the house bank, I plan to relocate the house bank to a storage area under the quarter berth on the port side.
I'm only concerned about ventilation. There is none.