Designed to clip on rail from below first, then other side from top so they counter act and less likely to pop off; a sort of clip twist.
Light can be clipped in before or after mounting to saddle. Should clamp opening should point towards saddle rather than ground to minimise chance of it falling out.
There is of course a maximum forwards position of the saddle required to allow space on the rails for the mount.
Two included:
Suggest printing in PLA tough.
The author marked this model as their own original creation.