By removing the ring from the old pads but it is clear how to do it and a manual is not necessary. But you should pay attention to how rum, the ring must be inserted.
So on the first new cushion I did my doctoral thesis. Again and again the stupid thing is slipped out. At some point even the plastic torn on the new upholstery. Then I was angry and I tried it with gentle force. And flupps, the ring was in it. So if you know how, it goes fast. For the second pad I have only a few seconds needed. And the crack in the first pads disappears clipped in headphones.
But from now on I was hooked. Soft feel great. The sound is by the good fit of the headphones now available again at worlds better than before. Enjoy with the headphone music fun again.
One point deduction only because of the difficult assembly (presumably allows the headphones with this but not lightening). The rest is absolute buy recommendation.