Quick question,I have 10 speed Ultegra shifters/front mech and rear mech,junction A connecter for the shifters,external B connecter that bolts to the BB ,all 6770.Will a 7970 wiring rear harness for an internal application plug into the 6770 external BB junction box and work with the rest of my 6770 hardware??Thanks in advance.
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Will a 7970 wiring harness work with 6770 hardware??
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