1.Remove the trigger assy,
2. take the hairpin spring from the side of the trigger housing - it looks like a "keyhole"
3. remove the safety button
4. Remove the pin - detent - from the trigger housing, the hairpin spring was holding it against the safety button.
5. Place the pin in the other side, then the safety button, then the hairpin spring.
Just got thru taking apart my trigger assy - see my very recent post:banghead: