Originally Posted by
SoSmellyAir
Per Shimano's instructions (for both 11-speed and 12-speed), the arrow on the quick link facing outward should point along the direction of chain movement as the crank is pedaled. This puts the pin attached to that quick link "forward" with respect to the path of the chain. But of course the other quick link facing inward is installed in the opposite orientation..
so, it sounds like the inner plate's keyhole is to the rear, when the link is on the top/pulling run.. cool. thank you.