Resolved Lost WiFi passwords - restore System keychain from Time Machine?

[InfoTime]

Need to restore my saved WiFi passwords. I travel around to lots of different sites for my work and had tons of WiFi passwords remembered on my Mac. I believe they were lost around the time I had to "Reset all Settings" on my iPhone after apps wouldn't load.

My theory is if I can restore the right Keychain I'll regain them, similar to what's described here

https://superuser.com/questions/487880/restore-os-x-keychain

Is /Library/Keychains/System.keychain the correct one to restore?

 

[InfoTime]

Looks like that was correct. Well, I restored all the keychains in that folder.

I tested it on a network that I haven't visited in a long time and it worked. Plus, the list of networks I see in Keychain Access is much greater now, like it used to be.