Festool Domino Joiner / Biscuits?

Was looking to use the Domino this evening. Is it in working order (and where is it normally stored?)

Is there a collection of domino biscuits with a donation box like with the sandpaper, or is it BYOBiscuits?

It is a Domino XL, bigger size. It is located with the dowl peg things in festool boxes to the left of the drill press