Yep, WWAG hit the right note. That is the pivot screw, not a limb locking bolt. I never took one of those off without having the bow completely broken down. I am guessing you will need to unstring it, and then unpress the bow to get it aligned again.

As someone else already mentioned, you may be bettr off going to a good proshop, or somebody that is knowledgable on this and let them give you some pointers.

Keep us updated..