boooring subject, but I could do with a small amount of help on removing a concert1 radio from an A3. I've bought the specific keys, with the little hook on the end. Am I ramming these into the 2 small slots at the bottom of the radio, situated to the left and right? or do they slide directly down the sides? If its the slots (im assuming) which way do they go in?? Putting the hooks facing in or facing out, I can't feel anything particularly 'clicking' into position exactly. I'd be much appreciate someones advice on this. ta!