Window Motor Gear Problem

[AZDevilRobot]

Hi everyone

For my team's disc shooter, we were thinking of using a gear system to angle our shooter. A 72 tooth gear would be attached to the shooter and a 14 tooth gear would be spun by a window motor and turn the big gear. The problem is, the small gear we have has a hex shape hole and won't fit on the window motor because of the shape and because its too big. Do we have to buy a gear specifically for the motor or is there something we can do so the gear will fit?

Thanks for the help
Team 4111