Shimano Ultegra R8050 Series Dealer's Manual page 59

INSTALLATION
Installation of junction A (EW-RS910)
Built-in frame type
If installing a built-in frame type junction A, make sure to use a compatible frame.
(A)
1
(A)
2
3
(A)
Pull out the electric wires through the
hole in the frame as shown in the
illustration.
(B)
Connect the electric wires to junction A.
Insert junction A into the frame and
attach the holder plate.
(B)
59
(A)
Electric wire
(B)
Frame
(A)
Junction A
(A)
Fixing bolt
(B)
Holder plate
Tightening torque
0.26 - 0.4 N·m