Shimano EW-RS910 E-tube Di2 Frame/Bar Plug Mount Junction A, Charging Point
Shimano SM-JC41 E-tube Di2 Bottom Bracket Junction for Internal Wire Routing. This junction A is required to connect the shifters via E-tube wires to the down tube junction wire. Shimano Tiagra / Deore CN-HG54 Bike Chain 10 Speed HG-X - 116L.