Apple Power Macintosh 7600/200 Series - Manual (Page 117)

5 Press the card gently but firmly until the connector is fully inserted.
m Don’t rock the card side to side; instead, press the card straight into the
slot. (Rocking the card can damage the PCI slot.)
m Don’t force the card. If you meet a lot of resistance, pull the card out and
try again.
m To see if the card is properly connected, pull it gently. If it resists and stays
in place, it’s connected. (Make sure you don’t pull the card so much that
you accidentally disconnect it.)
If you have other cards to install, put them in now by repeating steps 2
through 5.
117 Installing PCI Expansion Cards and Additional Memory