IBM 704 - Manual (Page 128)

Removing a Microprocessor
Insert the secondary processor board, component-side up.
c. Slide the processor board into the appropriate slot guides on
the system board.
d. Press the processor board carefully but firmly into the
system-board connector.
e. Rotate the processor-board handles to the closed position,
until the handles are aligned with the front edge of the
processor board.
15
Attention:
a. When you install adapters, processor boards, or
memory boards in the server, be sure that they are
completely and correctly seated in the system-board
connectors before you apply power. Incomplete
insertion might cause damage to the system board or
the adapters that you are installing.
b. Make sure you orient the processor board correctly
before pressing it into its connector. Failure to do so
110 PC Server 704 User's Handbook