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 AKKU E-Bike Battery Cover (6 sizes)
End Plug for Tern Rear Racks (each)
End Plug for Clubhouse or Vektron Frame Stand (Each)
Eclipse X22