Shimano GRX RX 815 Series Dealer's Manual page 108

INSTALLATION/REMOVAL
Installing the brake hose
2.
Fix the lever with the hose connector facing up by changing the angle
of the handle, etc.
NOTICE
• When attaching to the handlebar, adjust the angle of the bracket by tilting the
bracket from the handlebar so that you can turn the spanner. When doing so,
take care not to damage the handle, etc.
Handlebar
108