The ? is located on the left side of the room in the NW corner. Use the western door to enter the second map.
Note: If you have hand-to-hand skill above 250 and he offers you the Knuckles of Trials for the quest The Walls of Your Mind you will not be able to start this quest until you've completed the trial.Talk to Oggbi in Port Bastok inside the Steaming Sheep Restaurant located at (E-6) as a MNK level 40+.