No, not really. You'll have to configure something, whether it be a Connection Manager in SSIS, a format file or command line for bcp, or some other bulk loading program, that defines the format of those files. SSIS is not a mind reader or a magician 🙂

If the files are delimited you'll have a much easier time of it than if they are fixed-width, but to answer your original question, there is no way around defining the format of the flat file in SSIS within a Flat File Connection Manager if you want to load the files using standard out-of-the box SSIS functionality.