TheGiant EnergyPak Plus Range Extender mounting plateis used to mount theGiant EnergyPak Plus Range Extender. The mounting plate is screwed to the matching mounting holes in the down tube. You can snap the Range Extender additional battery onto the mounting plate with a twisting motion. Once mounted, the Giant Range Extender mounting plate remains permanently attached to your e-bike. Thanks to the clever design, you can continue to use a water bottle cage when the Range Extender is removed.