This item replaces your worn or lost end cap.
It only fits 2.0, see photo of logo below. If you don't have this logo on your post it's not compatible with this part.
Fahrer Bosch Battery Contact Cap
Fahrer Bike Handlebar Cover (3 Sizes)
Fahrer AKKU E-Bike Battery Cover (6 sizes)
End Plug for Tern Rear Racks (each)