What is the Shimano EW-JC200 Di2 junction connector?

The EW-JC200 is a 2-port E-Tube wire junction connector for Shimano Di2 electronic shifting systems, allowing two Di2 E-Tube wires to be joined at a single connection point. Junction connectors are essential routing components in Di2 builds where internal wiring must branch or route through tight frame sections. The 2-port design suits applications where a single branch point is needed -- commonly used to connect satellite shifters, junction adapters, or extend wiring runs in complex Di2 installations.

Compatible with Shimano Di2 E-Tube wiring systems. 2-port connection. Used in conjunction with EW-SD300, EW-SD50, and other compatible E-Tube wire cables. A small but essential component for complete Di2 wiring builds and service.