The same bracket will work for 6.5 speakers. There should be 2 sets of mounting hole on the brackets. The rubber grommet covered the 6.5 mounting holes on mine. look on the other side and you can see the different set of holes.
It should've been a piece of tape on it showing which holes are for the 7.1 and 6.5's.
I didn't have any tape on mine when I got them but was able to see the 2 sets of holes on the side of the bracket that didn't have the rubber grommet. I just punched a hole thru the grommet with a paper clip to see where it was on the speaker side.