Apple Macintosh Performa 6400 Series - Manual (Page 143)

3 Align the card over the communication slot.
The communication slot is the rightmost slot on the logic board as you face
the vertical plate.
4 Check the external connector on your card and see which of the following two
illustrations matches the kind of card you have. Then install the card according to
the illustration.
If the card has a hook on it, make sure the hook catches between the layers of
the vertical plate before pushing the card into the slot.
Communication slot Vertical plate
External connector
Communication card
1 If your communication card
has a hook on it (as shown here),
be sure that the hook engages
the sheet metal on the inside
of the vertical plate. 2 Push down on the back
end of the communication
card until it is firmly seated
in the communication slot.
143 Installing Expansion Cards