Shimano Ultegra R8050 Series Dealer's Manual page 114

CONNECTION OF ELECTRIC WIRES
Connection of junction B
5
Next, install the electric wire cover onto the frame.
Place the electric wire cover over the electric wires, and then attach it to the frame.
6
Once the electric wires have been
(A)
routed, secure junction B underneath the
bottom bracket shell.
114
(A)
Junction B fixing bolt
(10.5 mm or 15 mm)
Tightening torque
1.5 - 2 N·m
NOTE
To ensure adhesion, before installing the
electric wire cover, wipe off the grease on the
frame with alcohol or a cleaner.