The converter uses whatever output file name format you specify. Oh, and you appear to have made a typographical error in your command line, you specified -0 (zero) instead of -o (lower case O).
Select the tracks you want to convert, then open the context menu and navigate to Convert, ..., then change the settings under the Destination page. Output style and file name formatting. And there's a handy preview of all of the output file names at the bottom.