CREATE TABLE table_46604 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" TEXT, "Location" TEXT)

In which location did the Meca World Vale Tudo 6 event happen?
SELECT "Location" FROM table_46604 WHERE "Event" = 'meca world vale tudo 6'
SELECT "Location" FROM "table_46604" WHERE "Event" = 'meca world vale tudo 6'