It plugs right in. I think they are just trying to tell you not to run a
taillight by itself, directly off of the dynamo. They are not designed to
do that. I have several different dynamos with varying headlamp/taillight
configurations and they all work the same: taillight plugs into the
You *need* to wire the tail light from the headlight. If you do not, and
you turn off the headlight, the tail light may burn out because it cannot
absorb all the power of the generator. All modern LED headlights are
designed to power the tail light through the head light and switch the tail
