Apple Macintosh PowerBook 1400 - Manual (Page 176)

8 Locate the horizontal connector for the expansion slot card near the center of the
computer.
The connector is about one-half inch to the right of the keyboard cable.
If you don’t see the horizontal connector next to the keyboard cable, an
expansion slot card may already be installed in your computer.
9 Remove the expansion slot card from its packaging and position it above the area for
installation in the computer.
Hold the card by its edges, with the connector facing down at the end closer to
you. Take care not to touch any of the components or the wires inside the
connectors.
The card’s package should also include two small screws and a plastic cover
with the center cut out. Set these aside for use when the card is installed.
10 Carefully lower the card into the computer, rear edge first, and guide it into position
against the back of the case.
As you slide the card into the computer, use a slight side-to-side movement to
fit it into the small space.
Expansion
card socket
Expansion card socket
176 Appendix C