yep it was mine that was off... not by much, heres a shot of the passenger side (the one that is off) and the drivers side (which was a good fit) I had to shave about 1/8-1/4" off of the end of the passenger side to get it to fit like it does now, when i got them (ordered from e-bay) the passenger side just wouldnt go because that tab was not lined up and would get in the way
my tip for anyone doing the scangauge thing... use a dremel to get close.. but do that last 1/8 inch by hand with some sand paper on a wood block then just test fit, shave a bit off, test fit etc until it fits snugly