Apple PC Compatibility Card 12-inch card - Manual (Page 27)

14 Insert the connector on the bottom edge of the card into the slot whose access port
cover you removed.
Line up the connector with the slot. The port on the card should face the port
access opening on the computer’s back panel, and the card should fit inside
the card guide at the front of the computer. Press down firmly on the card
until the connector is fully inserted. Don’t force the card. If you meet a lot of
resistance, pull the card out and try again.
To see if the card is connected, pull it gently. If it resists, it is connected.
Port access
opening
As you lower the
card, you may find
it helpful to hold the
card slightly forward
of its final position until you
actually fit the card into its slot.
Install the card
into this slot.
Be sure that the card engages the
card guide at the front of the computer.
13 Installing the Card in a Power Macintosh 7200, 7500, or 7600