Use TARGETFILE with the SETDEFAULTS entry type to set the default value for the TARGETFILE keyword on ADDCONFIG and UPDATECONFIG entry types.
A name specifies the file to be processed.
For example, to set the default TARGETFILE value for file UNATTEND.TXT on drive D, you might use this:
SETDEFAULTS TARGETDIR = 'D:\', TARGETFILE = 'UNATTEND.TXT'