Replying to Binding tuning help!!!!!!!!!!!

On my right ski, the front part of my binding I believe moved a little bit forward. Every time I click in my boot is shakey and it doesn't feel good.... I heard there's a screw that has something to do with the vertical pressure on the binding and all I have to do is tighten it but I don't know which screw it is...... I have griffons btw, but if you could help me figure out which screw It is and what kind of screwdriver I need I would really appreciate it, thanks!