Horrible hack of the day
About 2 years after buying it, I finally installed the dynamo taillight on my trek. The install was moderately kludgy; I had to fabricate a mounting bracket for the taillight, then strap the bell wire (I used bell wire to carry the current from the head tube back to the rear of the bicycle) into place with a huge stack of zip ties, and then for attaching the taillight to the taillight connectors on my headlight I took a LED cable from an old junked motherboard, snipped the LED off the end, crimped the spade lugs onto the ex-LED connectors, then wrapped the cable around the head-tube and plugged the bare wire ends from the bell wire into the motherboard connector plug.
This is not exactly what you’d call elegant, but it does carry current to my taillight.