To me it looks like you're on Black Slab rather than Green Slab, certainly the long sling runner is on the flake/rib of Black Slab

Further to the above I've always taken Green Slab as climb up the boulder, up the shallow flake groove to the left of the rope and then carry on up to the "lower" bit of skyline finishing a bit to the left of the climber. Black Slab up the rounded rib below the long sling runner, up the flake rib immediately past the long sling runner and finishing up where the climber is.