I have an F frame Moulton with a front Dynohub, a Sturmey Archer front light and a Soubitez at the back. The front light works but the back doesn't.

The Soubitez has a plastic body with a metal mount and a hole underneath big enough for a single wire, although there are 2 wires running from the front light to the back. I think the metal mount is meant to earth the light to the frame whereas the front seems to lack an earth. I presume the original SA back light had terminals for both wires and that as the Soubitez only has a hole for a single wire, the 'spare' wire was connected via the mount.

My questions: Should this Soubitez work, and that it doesn't mean that it is faulty? Or is it incompatible with the Dynohub?

Thanks! I've never used a generator before.

Dawes-man