99 ZX7R - Rear wheel

You know those little cushions that go inside your rear wheel with the nobs on them, What effect does it have if they're put in the wrong way, There were markings on the inside of the wheel that made me think the nobs were to face inwards, but looking recently at diagram of the rear wheel it appears they're meant to face outwards...
Any idea on what this can cause?? or if its not really a problem at all?
Any idea on what this can cause?? or if its not really a problem at all?