I don't have a Server.app 5 configuration handy to check where that data is being stored.
Here's how I'd look for this, though. Launch Terminal.app from Applications > Utilities and issue the following command:
find / -iname "OneOfYourFilenamesHere" -print
That'll take a while to run, but it'll find any file with the filename OneOfYourFilenamesHere anywhere on your file system. Use the double-quote character to quote the filename, to avoid any odd characters that might be present in the filename.
You may (will) get some "Not a directory" and "Permission denied" diagnostics. That's normal.
If the filename does not show up, then change to the following command:
sudo find / -iname "OneOfYourFilenamesHere" -print
You'll have to enter your administrative password for the sudo, and that might generate a one-time message about the use of sudo. The command will then run (again, this takes a while), and you should see rather fewer of the "Permission denied" errors, and the path to your file should show up in the output.