Intermec EasyCoder PD41 Installation Instructions page 3

5 Slide the cover out along the rails and remove it from the printer.
6 Put the printer back in upright position.
7 Remove the small plate that covers the slot for the Parallel board on the
back of the printer. Keep the screws.
8 Use the screws that were removed in Step 6 to secure the Parallel board in
the slot.
9 Connect the I/O bus cable to the printer main board.
Parallel IEEE 1284
interface board