Sunroof adjustment

[Pinchak]

Want to adjust my sunroof on my 94 530i. Have the 5 series Bently manual and it gives instructions on the adjustment. Did the first few steps but cannot figure out how to lock the sunroof guides as instructed as it is difficult to see the area and locate the guide slot for the allen wrench. Any suggestions to help?
I opened the sunroof about 4 inches as instructed.