Help: Adjusting Brake Hoods

Trying to adjust the placement of the brakes on my road bike and having some trouble. They are ultegra brakes 10 speed brakes and I can’t seem to roll back the rubber brake hood cover enough to get to the bolt on the outside of the brake -seems like they will tear if try to roll them further. The bolt face which I think is the one I need to loosen is forward facing rather than facing to the side which make it real tough to get at. Am I missing something or is there an easier way to go about this?

I think step one is what you need

http://bike.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50lparsys-0029-downloadFile.html/05)%20STI%20Lever%20Installation.pdf
.