oh heck if they came with adjusters, take them off, slap the ones from your stockers on there and I bet that you are where you need to be or close to it.
But if not, yes those screws physically move the headlight housing. There are two on the fender side - Turn both of them one way and that side of the light will physically move either forward or backwards. This will move the beams light either in towards the center, or out towards the side if they are moved at the same rate. If you move the top a little less then the bottom then it will move the beam of the light up/down as well. So pull you car up to your wall/garage and turn the lights on and start adjusting them till the edges are even and the light is where you want it. With some lights it takes a little time and maybe a couple of sessions but don't let it get the best of you.
