I looked at the manual and it's goofy that it doesn't say a single thing about adjusting them.

One screw adjuster should be for right and left cyclic (if you are holding the heli with the tail towards you) and the other should be rotation.

What I would do is center both adjusters up. Pick an adjuster and turn it fully one way or the other and do a quick test flight with it to see what it does. Don't get it way up in the air only maybe about a foot off the ground that way if something wierd happens or it's not the right adjustment you can set it down fairly quick without trashing it.

Also would be a good idea to set all your trims to center as well.