u have 4 screws two on each side that will make the sunroof aligned to the roof.i sugest u download rave,to know more about how the system is made,these screws are very easy to adjust and align the glass to the roof,all what u have to do is remove the two plastic things from the left and right sides,and u will have the screws in ur visual,loosen them the 4 of them while the sunroof is closed then when they r loose u can push the glass up and down with one hand and tighten the screws with the other hand.
u can do it by urself if u have 3 hands,one hand to hold the glass,the second to tighten when the alignment is done,the third to feel the glass edge with the roof from the outside to know that it is aligned with the roof.......! or get someone to help u out at least by checking when it is aligned from the outside with the roof.