Help with PA RMR. Thrust an Clamp Screws???

[SoCalGunny]

Curious on what these 2 screws mean?

This is the older green dot version not the newer red dot version but curious on these 2 screws on the back "Thrust" and "Clamp" screws.

Such small screws I don't want to force anything.

[PrimaryArms]

Don't adjust them