Shimano offers several so-called B Junction, Y-Split connection harnesses for e-Tube Di2. These connectors have been developed to allow you to connect your cockpit controls as cleanly and efficiently as possible. All options start with EW-JC130. Each version features three cables that join at a permanent Y-junction, with three male connectors, one at the end of each cable.

This EW-JC130 Y-Split e-Tube Connector has a (A) feed out of the Y-Split, which connects to the A junction box. One branch of the Y-Split is long (B), the other is short (C). This system cannot be shortened or modified, and works with all e-Tube Di2 shifters. There are multiple length options available to meet your needs.