Directions - Located in the MTA paid zone in the hallway that connects the 4,5,6 trains to the S shuttle to Times Square.
From Grand Central Terminal Or Any Street Level Grand Central 42nd Street Subway Station Entrance - Follow signs for the NYC subway 4,5,6,7, S Shuttle to Times Square. Pass through to the MTA paid zone and walk to the S Shuttle Corridor. The kiosk is in the corridor closer to the S Shuttle platform next to the news stand.
From The S Shuttle - Walk through the S shuttle corridor follow the signs for the 4,5,6,7 trains. The kiosk is on the right hand side.
From The 4,5,6,7 Trains - Walk through the S shuttle corridor, follow the signs for the S Shuttle to Times Square. The kiosk is on the left hand side.