This morning i took out the stereo to have a look around and just double check all the connections etc etc. Naturally, while screwing in both the top screws my fingers managed to slip (YES TWICE

) and both top screws slipped off their holes and fell down the sides . I tried to prod my fingers around the centre area but couldnt locate them. I currently therefor only have the bottom 4 screws holding the stereo in place. Is that ok? Or is it necessary i buy another couple of screws?