https://forums.electricbikereview.com/threads/easy-install-of-a-tail-light-on-a-trek-xm700.11616/
Easy install of a tail light on a Trek XM700+ | Electric Bike Forums
If you own one of these bikes you have a front light, but no taillight. Well, that's pretty easy to fix. I purchased two parts, a "Bosch" and a rear cable...
easy installtail light