What DSN file is MS Access using for ODBC Linked Tables?

I set up a linked tables in Microsoft Access to connects to an remote database using ODBC with a File DSN. But which DSN file is Access using now? I want to examine it and compare it with the other versions. The Linked Table Manager only lists the tables and the name of the database. I tried renaming all of the DSN files I could find, and the ODBC connection still runs. Is Access storing the connection string itself?