[joecaption]

Just look for the fastner area.
It may be metrix so make sure it screws all the way in. Some standard and metric are so close buy will only start in the hole.
You will also need an allen wrench.
The screw that was in there in the first place was most likly a sloted head so you may want to change both screws so you do not to find two differant tools to work on it.