HP LaserJet M3027 Multifunction Printer series - Manual (Page 251)

Use HP Jetdirect print server cards
Follow these procedures to install or remove an EIO card.
Install an HP Jetdirect print server card
1. Turn off the device.
2. Remove the two screws and cover plate from the EIO slot on the back of the device.
NOTE Do not discard the screws or the cover plate. Save them for future use if you remove
the EIO card.
3. Install the EIO card in the EIO slot and tighten the screws.
ENWW Use HP Jetdirect print server cards 239