CASB File Scanning and Malware Quarantine Location - where?

I understand the concept - move the identified malicious content to a special folder identified by the filepath entered into the ZIA Admin portal.

But, it’s not clear what this filepath should be. Do we assume it starts in some system root folder? In the user’s root folder? We can experiment and find out, but I’d rather have some basic idea of what to expect.

Can someone give me some clues?

Poking around a bit more, I found that the answer is posted in a different Help page than the Admin console takes me to.

I found it here, though even so, I’ll have to experiment a bit to see how best to use this.
Configuring the SaaS Security API Malware Detection Policy | Zscaler