HP LaserJet Enterprise 600 Printer M603 series - Manual (Page 181)

7. Reinstall the right-side panel. Align the tabs on the panel with the slots in the product, and push the
panel toward the front of the product until it latches into place.
8. Reconnect the interface cable and the power cord.
9. Turn the product on.
ENWW Install memory and internal USB devices 165