It allows you to connect a comms link to the organiser even when the printer is attached. At the top is the printer itself. It is a thermal printer, so it needs special paper to work. It uses a roll of white thermal paper of up to 110mm wide, and this is placed on a spindle behind a transparent grey plastic cover. There is a serrated metal edge for tearing off the paper you have printed.
Some printers have a magnetic card reader built in.
These have a slot running from left to right halfway between the organiser and the metal tearing edge. Loading the paper Only do this when you have an organiser inserted into the printer. Remove the transparent plastic cover and pull out the spindle. This spindle has two black plastic discs threaded on it. Remove one of these and thread on the new roll of paper, and replace the disc to keep the roll in place.