Replaces the tail light with a 7/8" shaft to accept any common bicycle light. It would be better to get a proper hardwired tail light which would have the brake light function, but I replaced my controller with a generic one and haven't wired it up for lights yet.
Might also work for M365 clones. The stock tail light I replaced has a 30mm x 15mm shell, and the screw holes are 15mm apart.
The author marked this model as their own original creation.