Correct, remove and hit button to unlock and re-install.
Or remove and manually lock then reinstall actuator as long as actuator is in the lock position.
If you do it manually you need to spin the tire while you are doing it. It’s in the link to my original post
Shouldn’t matter, u can manually lock/unlock it in with your hand at the Xfer case when you pull the actuator.
Just make sure you hook up actuator and cycle it whatever way to match before installing actuator.
See here
https://forum.ih8mud.com/threads/center-diff-locking.1211787/