The SGP Ultra Fine (matte) screen protectors will probably not help as it only has one side to peel off. That side is only labeled "Back", letters colored in orange.
However, since the SGP Ultra Crystal screen protectors are glossy, like the GLAS.t screen protectors, they come with two sides to peel off. The labels are as follows:
"Front 1" - letters colored in blue
"Back 2" - letters colored in black
I interpret that to be to peel off the "Back - 2" to be applied onto the iPhone screen & once that has been done, peel off the protective front film labeled "Front - 1". Once again, I'm sure I'm wrong.
I think you'll have to be a bit patient & wait for the other owners of the SGP GLAS.t protectors to chime in with their findings to be absolutely sure if you've applied your screen protectors correctly.
Good luck.