Sony PCG-XG18 Primary User Manual page 72

You can connect the printer to your computer using the printer cable and
the supplied floppy disk drive cable to print documents.
You need to install the software supplied with the printer. See the
manual that came with your printer for more information.
You need to set up the printer's port. See I cannot print on page 78 for
more information about setting up the printer ports.
Plug the floppy disk drive cable to the docking/FDD connector on your
computer. Then connect the printer cable (supplied with the printer) to
the PRINTER connector of the floppy disk drive cable.