ok will use your tein diagram to help ok?:
first loosen the lock nut right above section C. loosen it and screw upward. then screw section C mount upward to a determined height! then use the lock nut to secure all inplace. if the car is still not low enough and the the bottom section C is maxed out and cant be raised anymore, u must adjust the spring preload!
adjust spring preload: between sections B & E there are the 2 locking nuts, loosen them and screw them downward by doing this the springs preload will lessen and the cars ride height will lower aswelll! then lock the nuts back inplace to keep from adjustments from moving!!!! its not that diffucult!! i really suggest that you use a tape measurement to record before and after adjustments on all sides to make right and left are equal!!! and for futher adjustments!!!!!