The SL “connector-less” system simplifies wheel changes: No more wires! Using a special dropout on your fork, the electrical connection is automatic: One pole is routed through the axle (and your frame), the other through an insulated ring that mates with a corresponding, insulated ring on your dropout. Simply insert the wheel, and the light is connected!
Contact Kit for SON SL 12 mm Thru-Axle Hubs
These contacts are press-fit into the SL Dropouts for 12 mm thru-axle to conduct the current from the hub to the lights. A 50 cm-long wire (not shown) is soldered onto the tab on the stainless steel connector ring.
Made in Germany.