This is not a dumb question at all.
Yes, if you want to save your file without the file dialog you have to provide the file path to that pin. However, since LabVIEW uses as specific data type (green) for file paths, you cannot wire a string directly to that pin.
What you need to do is to build your file path. You can do this many ways; one way is that you set it up as a string and then convert the string to a file path using the String to Path function under the String/Array/Path conversions. However, a better way could be to use a path constant (e.g. the current VIs path) and modify it to fit your needs. That will allow more flexibility if your application is copied to another computer with a different file structure. Path constants can be found under the File I/O.
There you also have Build path and Strip path that are useful for modifying paths.
I attached a simple example, Save File.vi, that show how it works. Hope this helps. /Mikael
