[MlMt] Location of settings folder?

[davecc0000]

>> The Mac OS hides the ~/Library folder by default. To navigate to it, press the Option (Alt) key while you click to open the Finder's Go menu, and then select Library. Alternatively, in the Finder, click Go > Go to Folder, and then enter ~/Library. (The tilde is an OS placeholder for the current user's folder.)

I have another question:

If I want to retrieve MM settings from a Big Sur boot volume that i cannot boot from on this computer (Big Sur is not compatible on this new-to-me old Intel mini that I’m installing Sierra on), how do I get access to the Library folder in the Big Sur volume so to copy to the Sierra Library folder?

Thanks,
Dave