Shimano Ultegra R8050 Series Dealer's Manual page 77

INSTALLATION OF HYDRAULIC DISC BRAKE SYSTEM
Installation of the brake hose
End of the brake hose on the brake caliper side
Attach the connector insert to the brake hose.
After that, while pushing the brake hose, tighten the connecting bolt.
(A) (B) (C) (D)
77
(A)
Brake hose
(B)
Connecting bolt
(C)
Olive
(D)
Connector insert
Tightening torque
5 - 7 N·m