While my front diff is apart I figured I would take a quick video to show how it operates, very quick and amateur. But if you are ever wondering, it's pretty simple.
https://youtu.be/YzRjxcWW75o

Here's a photo of the 4wd actuator removed showing the little gear on the actuator and the corresponding toothed block in the diff that moves the locking mechanism

[2015 Z Force 800 53/Trail EPS]

Cool..

Awesome & Tx's for posting! It is pretty simple until you look @ the wiring diagram & try to figure that out 

Looking at that wiring diagram makes my head hurt.
Thanks for the photo's and all, it's good to see what's inside.

lol, yes. mechanical operation pretty simple. I did not get into the wiring... fortunately mine works so I haven't had to go down that rabbit hole yet.