Yea Any how I have 3 Dynohub LED light bikes , all use German hubs and Lights
After 30 years My Battery Vista Light failed ,
one of the spring contacts for the (-) side of the battery broke,
Lots of taillights go on bare Seat posts, I needed a Bolt on..
(I Used a Vistalight with a stud on the back )
so 'Planet Bike's' Rack Mount adapter , did what I Needed , and their battery Light's
clothing/strap clip slides onto that adapter ..
It's My Cold weather bike, so battery head and tail light go in my pockets,
until I need the light ..
...