Right now you're facing the edge of the wall and to the right side you can see a window. Turn towards you're left and exit the washroom. Move little forward you can find an another door, exit through that door and take a left turn now you can see two arch in front of you. take a left turn from there you can find an open door. Enter into that room through the opened door you can find a empty cupboard in front of you. Slightly turn towards the right side and move forward, on the right side you can see an another cupboard. Stand in front of that empty cupboard and that is the end point.