Follow the video provided by Cntrydawwg and you should be fine.
Be careful and mind the 3 (2 in your case) springs that are under tension. They can launch up to 2 miles
, well may as well be that far...
While the sear cage is apart I polish the "pocket" under the spur of the controller and the barring surface of the lever int the sear cage for a smooth decocking action that allows me to ride the hammer to the decocked position. Not a necessary step...just completes a refined custom feel to all the controls.
Big satisfaction and pride are headed your way my friend.