Where is the AUX in my 2004 Acura MDX?

I have a 2004 Acura MDX Touring RES. Underneath the nav there's a "dvd/aux" button, and I can turn the aux on, but I can't find the plug anywhere to actually get my phone plugged in. Does anyone know where it's located? Thank you very much!|||There is no jack in the front of the radio, but there's an output jack located behind the whole radio (you have to take apart some stuff to get to it). http://crutchfield.com has different aftermarket jacks and other options.