A/P Invoice Import/Export not including Project/Segment/Employee information

I hope this is the right place to ask this. Im just a lowly IT person attempting to help our Admin dept. They are using Sage 300 and we are trying to import an excel doc into Projects A/P Invoice Entry. I exported one that was manually entered correctly to get the proper column names, but I noticed that the Project, Segment, and Employee fields at the bottom do not seem to export. I was able to import the Invoice_Details but then they have to manually go back though each line item and add the Project, Segment, and Employee fields. Am I missing something? Any idea what those field's column names would be? Below is a screenshot of the fields I'm talking about