Publishing file output from OneStream to Microsoft SharePoint

Has anyone pushed files from OneStream FileShare to a company SharePoint site?

Is the best approach using Microsoft's SharePoint client object model (CSOM) to upload to subfolder in SharePoint (I assume that OneStream support would have to load the Microsoft.SharePoint.Client DLLs to your system)?

Or would it be to use SharePoint's REST API Endpoints to make the connection and post the files to a subfolder?

Can anyone provide examples or snippets of either approach?