HP LaserJet Enterprise 600 Printer M603 series - Manual (Page 180)

4. Open the access door by pulling on the metal tab.
5. Locate the USB ports near the bottom of the formatter board. Insert the USB device into one of the
ports.
CAUTION: To prevent static electricity from damaging the formatter board, hold the metal
access door with one hand while you insert the USB device with the other hand. If you move away
from the product during this procedure, be sure to touch the metal access door to discharge
electricity before continuing.
6. Close the access door, and press firmly until it snaps into place.
164 Chapter 9 Manage and maintain ENWW