GCP Sink Connector - What should Credentials File path location be?

I need to create a GCP object storage sink & using the Lenses connector. I am required to use authentication keys within a file.

In the documentation, I can see that connect.gcpstorage.gcp.auth.mode=File is available; my question is this: where does the file need to be stored in order for the connector to use it?

Should the file path I provide with connect.gcpstorage.gcp.file be a file path on the Connect Worker? On Lenses itself?