Hello. Working on a weekend bike project...and I have no experience with electronics.

I have a SON hub, eDelux front light, and a B&M Securelite rear light. The eDelux will be mounted to a steel rack via an aluminum bracket; the Securelite will be mounted to aluminum fenders. I understand how to connect the front light to the hub, but I do not understand how to wire the rear light.

The Securelite has two plugs. One is marked earth and the other power. I assume I run the wire from the power plug to the corresponding plug on the eDelux. But what bout the ground/earth plug? Do I run another wire from the earth plug (with the ground connector thing attached on the other end) and bolt it down somewhere on my bicycle? I could sandwich the ground connector between the light and the bracket/rack, correct?

Do I even need a ground with this setup? Would it be a good idea to go ahead and do it?

Thank you.