Polaroid P4000 - Manual (Page 11)

Page 8
7 Replace the loaded ribbon cartridge in the printer.
— Make sure both spindles rest in the black supports
on the left side of the printer.
— Make sure the ribbon cartridge handle rests in the
supports on the right side of the printer.
— Make sure to install the full, new spool toward the
input hopper of the printer.
8 Close the printer cover. Press down firmly to latch it.