Shimano Ultegra R8050 Series Dealer's Manual page 58

INSTALLATION
Installation of junction A (EW-RS910)
9
10
Affix handlebar tape following the same steps as for the handlebar end fitted with junction
A.
Secure the dummy wires to the
handlebar using tape or a similar
material.
(A)
(B)
58
(A)
Dummy wires
(B)
Tape
TECH TIPS
What are dummy wires?
Dummy wires are attached to ensure that
both the handlebar end fitted with junction A
and the opposing handlebar end are of the
same thickness when wrapped so that
discomfort is not caused to the rider when
gripping the handlebars.
When securing them to the handlebar, route
them in the same manner as the electric wires.