Make your way to El túnel del Jamón (inside of the Mercado Central) to begin your tour. Upon arrival, simply inform the waiter that you are participating in the tapas tour and show them the QR code. After that, you can go to the next stops (La Terraza Valencia Bar, ORIO Valencia and Món Orxata).
This tour ends at Món Orxata, a small stall located in Plaça de la Verge in Valencia. The stall is located in front of the cathedral entrance, on a corner right across. You'll find it easily.