Shimano Ultegra ST-6870 Dealer's Manual page 18

INSTALLATION
Electric wire wiring diagram (junction (A) side)
5 port
Clip-on bar type
SM-EW90-B
E-tube connector
Connector for remote sprinter
shifter
Time trial / Triathlon handle type
SM-EW90-B
E-tube connector
Connector for remote sprinter
shifter
ST-6870
E-tube
Port for remote
port ×2
sprinter shifter
SW-R610
option
ST-6871
18
SW-R671
option
or
ST-6870
E-tube
port ×2
SM-EW90-B SM-JC40/41
Junction (A) Junction (B)
E-tube port ×5
SW-R671
option
6 mm
18 mm
SM-EW90-B
Junction (A)
E-tube port ×5
SW-9071
option
Port for remote
sprinter shifter
SW-R610
option
SW-R600
option
SW-9071
option
or
ST-6871
SM-JC40/41
Junction (B)