Ensure that it the rack has been fitted correctly, as specified when new and dealer-fitted. That means having suitable bracing underneath the body and requires the tank to be removed for correct fitting. Just putting bolts through the fibreglass will see the rack and tops flying off at anything more than low speed.
Dazaa is correct. They were fitted by the dealer not the factory and the dealer isn't going to start dropping the tank on a brand new car. Same fitting for the passenger side mirror base plate.