Fujitsu Primergy RX100 S3 Options Manual page 18

Opening the server Preparation
Figure 3: Loosening the screws
Ê Unlock the top cover by removing the knurled screw at the rear side.
Ê Push the top cover approxiate 2 cm frontward.
Ê Remove the top cover.
18 Options Guide
U41617-J-Z156-1-76