HP Net PC 20 Supplementary Manual page 27

7 Align the board's connector with the slot's socket. Firmly press the
board into the socket. Ensure that the board's connector engages
completely with the socket.
8 Close the retaining bracket and fasten the screw.
9 If you moved the front chassis, slide it back into place and replace the
two screws.
10 Replace the cover (described on page 10) and reconnect all cables
and power cords.
Accessories Guide
Installing Accessory Boards
English 27