I got a new GRX, that has a dropper remote in left lever, but it takes the cable with the end. My dropper takes this end too. So I found a solution. Part of X01 chain fits on the cable very well and can be soldered on. There was not a lot of space to do this, but on 2nd try I managed to make it stay on and could not pull it off with pliers. I really hope it will stay put, because it was a PITA, but it worked. So if you run into this, you are very welcomed to steal my trick.