HP 98568A Installation Instruction page 45

HP 98577 A VMEbus Expander
21. Re-install the power supply access doors on the cOlllpllter and tighten the
captive screws. Make sure that the "feet" on the bottom of the door are
installed in their retaining slots.
22. Install the rear panel screw removed in step G on the Expander.
2:3. Connect the power cords to the computer and Expander. The combined
units are now ready for testing.
Adding Expanders 2-21