Ash and Jarrod are at Pink's Hotdogs in LA, sitting just a little further back than where this marker is
hereYou can also see the billboard from the street view
here, it's just behind the blue car.
They look excited to be reading the clue, maybe this is the one that tells them to fly back to Aus
I would suspect they'd be happy to be racing in their home state
Also, they're wearing Pink's hats in the second cap, but sitting down without them in the first -- so are they serving the hotdogs or eating them