Apple Macintosh Performa 6360 Series - Manual (Page 139)

8 Align the PCI card and the adapter over the PCI slot.
9 Insert the adapter into the PCI slot on the main logic board. Make sure the metal fence on
the PCI card engages the hook on the vertical plate and that any connectors on the card
protrude through the PCI access port opening.
If you meet resistance, pull the adapter out and try again. To see if the
adapter is properly connected, lift it gently. If it resists and stays in place,
it’s connected.
Vertical plate Card fence
The card is properly seated when the card’s metal
“fence” engages this hook on the vertical plate.
PCI slot
PCI access port
Vertical plate
139 Installing Expansion Cards or Additional Memory