Yes, 2 baffles as indicated by the hatched lines in the top, side view, of the drawings. Middle plan view is the starboard side tank, lower is port.
Finnish ‘Loiskelaipiot’ seems to translate to ‘Shale bulks’ !! I guess it means ‘bulkhead’ or baffle.
Fill and vent are in the middle section, pickup/return is in the aft section, the bottom of the pickup is in the little ‘sump’ shown in the drawing. The opening between the sections is a quite small cutout at the bottom of each baffle.