Cheers orcomma, I suspected that was what was behind the plate, but I had no idea what the vent slots were for :) Coysht, I don't have the card slots as I have the ESP button, but the slots in question are further over and up, you can't see them normally, but if you look behind the left stalk then you can see them. iNath, ta for the picture, I've got the AUX port, but not the USB one. I was wondering what's behind it to see if I could run the USB from my Parrot to it. Looks like the USB will just have to stay in the secret hole.