I put my cluster in today, but I couldn't remember what the "correct" screw looked like (after nearly 8 years apart). I only care because I want to be sure the screws I use aren't needed somewhere else.
th one si used were Phillips head. They worked just fine, and I only had 4 of them, so they seem to fit, but if anyone has or can get pics of the right ones, that would be great. Gratuitous installed picture included.