Don't know/ can't tell. Somewhere under the bottom. And not every time. I had a guy come out and look at it once and after extensive examination he said repairs would be expensive and we'd be better off buying a new one. Something about a broken seal but he didn't really seem to be looking at the door gasket (it's a front loader). The thing doesn't wash real well, and the dishes don't dry, either.
@featherhead007, we use the little gel pods but once a couple years ago when I wasn't home apparently we were out of them and my very helpful DD filled up the little cup with Dawn dishwashing liquid instead and bubbles poured out, blanketing the floor. I only heard about it recently and never knew why the thing didn't work right, it was fairly new at the time. You know how kids are, they can destroy an anvil.

She is infamous for this kind of thing, lol. Using oven cleaner for furniture spray, turtle wax on windows, that sort of thing, when she was little.