The SL S Shimano is suitable for Shimano Steps E8000 drives.
700 Lumens E-Bike light, black
Mount for 31.8 mm handlebars
Direct operation on 6V
The light is not suitable for older models, because the lighting port does not supply a high enough current.
To connect the E-Bike to your light, you eventually will need a light cable.
If there is no cable, the cable must be put through your bike frame. The light cable is not included with the light !