You are standing at the entrance of the washroom, facing towards the shower area, turn right, walk straight, to left you have a two close doors, stand in-front of the close doors, turn right, in-front of you there is a wall, walk straight to the wall, turn back, to left you can see a staircase, climb the staircase completely until you reach an open door in-front of you, stand on the last step of the staircase, that's your end point.