Shimano GRX RX 815 Series Dealer's Manual page 59

INSTALLATION/REMOVAL
Installing junction [A]
TECH TIPS
• If the adhesive force of the double-sided tape on the handle holders has
weakened, cut some commercially-available double-sided tape as shown in the
figure below and replace them.
5.
Temporarily secure the electric wires to the handlebar.
(1) Adjust the length of the electric wires by tucking any excess length into the
handlebar etc.
(2) Temporarily secure the electric wires to the handlebar using tape or a similar material.
15 mm
Electric wire
Tape
59
10 mm