You're now facing towards the wall. Turn slightly left, walk towards the open door and turn right. Now move towards the round table and walk straight towards the stairs. From the stairs, take right and enter the vault. From the vault, take first left and walk straight to the room which is open in front. From here, turn slightly right and walk out of the room from your right. From here, turn left and walk towards the open room. From here, turn left again and walk straight by passing the washbasin on your left. You will find an open room in front. Stand near the entrance of that room, you will reach your destination.