How do I access a saved pdf from HTML in a code block? How do I find the SquareSpace URL of that pdf?

Site URL: https://epwsociety.com/

I have hand coded a table in HTML and using a code block but need to hyperlink different cells in the table to different PDFs already saved in my website database.  Using href="master-website-URL/s/pdf-name" or "master-website-URL/pdf-name" doesn't work.  Any ideas as to what I am missing?

Did you try /s/pdf-name for the href attribute?