Money Grab has two teams fighting battle it out over money located in center of the map which they need to steal and bring back to their base. (screenrant.com)
Follow Midna to the north center of the map and begin battling with her. (linkshideaway.com)
C looks like the entralink in how it isn't connected to anything else and the fact it was in the dead center of the map, maybe a precursor to the dream world? (glitterberri.com)