The image shows the Roadlink in place on the brazed-on, Trykit rear hanger. The Roadlink lowers the Athena rear derailleur by 23mm to cope with the abnormally large, 36tooth sprocket. The Athena 11sp. can cope with a 32t but collides straight into a 36 tooth sprocket without the Roadlink's help. The Athena mechanism folds up automatically under its spring tension to ensure that the smaller sprockets aren't left behind. The arrows are supposed to indicate the importance of pushing the Roadlink and rear derailleur fully forwards to their stops before the twin hanger screws are tightened fully.
It should be noted that Wolftooth do not suggest that Campagnolo equipment and their rear derailleurs are supported. They were obviously not able to examine every possible combination of equipment while developing the Roadlink. It's stated purpose is to allow Shimano, road, rear derailleurs to use much wider range cassettes. They also suggest that medium cage road mechs are optimum and the Roadlink is not intended for triple chainsets.
Though still not very warm outside I am keen to have a ride to see how the Roadlink has helped the indexing on the 11 speed, 11-36tooth cassette. The sun is still shining with light winds so it is still a great day for a ride. I did a four mile ride to test it out. Much improved over the M8000. Though still lagging occasionally. No phantom changes on the largest sprockets any more. Rode 12 miles to a bike shop only to find it had closed down. Bit of a headwind on the middle leg for a total of 27 miles.