Does anyone know where the firing pin/spring goes on a Soc it Flli Galesi Brescia?

[MarylandDom]

I was given a Soc it Flli Galesi Brescia Cal635, it was in pieces when I got it. I can get it together without the firing pin....just cant seem to figure out where it goes. If someone could let me know it would be alot of help.
My email address is DomismoD@aol.com
Thanks!

 

[Bill DeShivs]

It goes in the circular channel in the slide.