Hitachi CB 520H B1 Service Manual page 218

3 Insert the pass through mezzanine component into server blade
.
connector and storage expansion blade connector straight downward.
Make sure to insert the arch shaped guide bracket into edges of server
blade and expansion blade.
4 Push the portions indicated PUSH on the pass through mezzanine card
.
and cable connector to connect to the server blade connector and
expansion blade connector, respectively.
5 Close the latches on the pass through mezzanine card.
.
5-66
Figure 5-81 Removing the connector cover
Figure 5-82 Inserting the pass through mezzanine component
Replacing parts
Hitachi Compute Blade 500 Series System Service Manual