HP Model 743 PC Owner's Manual page 56

NOTE:
Expansion Adapter
with 2 PMC Cards Installed
Front Bezel Screws (2)
Figure 2-9
2-18
Accessories Installation
PMC Bridge Adapter and Expansion Adapter
9 Making sure that the connector and bezels are properly aligned, install the
PMC expansion adapter onto the bridge adapter, as shown in Figure 2-9.
Ensure that the interboard connector seats properly by applying pressure
to the top of the expansion board and to the bottom of the bridge board.
There are two screws that secure the front bezel and four screws to secure
the VMEbus connectors.
If the interboard connector is not tightly seated, PMC cards on the expansion
adapter will not operate.
Installing the Expansion Adapter onto the Bridge Adapter
Connector Screws (4)
Bridge Adapter
Interboard
Connector