Bike build help! Is this shimano 105 r7000 derailleur correctly attached to this hanger? The B link thing is confusing (Bike frame is vintage racer frame from early 90s) More details in
SHIMANO 105 Medium Cage Rear Derailleur 11-speed | SHIMANO BIKE-EU
Shimano 105 11Speed (34T) RD-R7000-GS Medium Cage Road Bike Rear Derailleur | eBay