Now, you are facing towards the open grill door. Turn around and take the stairs and move up. Once you reach up, turn to your right where you can find another staircase. Take the stairs and go up. Now, turn right where you can find an open white door. Enter through it and turn left where you can see an open entrance. Enter through it and walk straight towards the window. Now, turn left from the window and move forward and that will be your end point where you are facing the wall in front of you.