Link thinks about this. Nods. He absolutely understands none of how this works, but it's also not the first mysterious device that he's encountered.

He's learned it's best to just roll with these kinds of things, really.

So he opens the door. Puts in the protein paste, and then closes it. Then looks at Lark.

He could just press some of the buttons at random, and see what happens. But Lark seems to know what to do, so he'll see what she suggests first.