Apple Workgroup Server 6150/66 - Manual (Page 46)

7 Attach the card to the adapter card assembly.
Rest the adapter card on the edge of a flat surface, with the metal bracket
pointing up.
Slide the card into the bracket. The pin on the bracket should line up with the
hole on the metal end of the card.
Press gently on the cards to push the connectors together.
When the cards are attached correctly, the pin fits into the hole and the guide
fits into the slot, as shown in the illustration.
Pin in hole
Guide in slot
30 Chapter 3 / Expanding Your Server and Connecting Other Equipment