If you are goingg to be installing the SAVII trigger you will need a top release action. If it began life as an accutrigger only the accutrigger parts will fit.
A hodge podge of pictures but maybe it will help in some ways
ns
This is an accutrigger safety
https://proxy.duckduckgo.com/iu/?u=h...00x525.jpg&f=1
This shows shows a different thumb switch and is for the older pre accutrigger actions. It is assembled much differently. Typical pre accutrigger parts. The safety is inverted but shows the design well.
https://proxy.duckduckgo.com/iu/?u=h...4164_1.jpg&f=1
It is all I could find but I know with the right search terms on youtube, you could find good frames of the two different components. The SAVII works with both if you have the correct parts.