Turn left from the place you are standing and go up the stairs, you are facing towards the wall right now, slightly turn to your left and move forward, to the right, you can find an opened door, move towards the opened door, turn back, you can find a closed door infront of you, move towards the closed door, turn left and enter into the room, move towards the closed door which is infront of you, where to the left you can find a cabinet, that would be your end point.