IBM 704 - Manual (Page 115)

Installing a Microprocessor
19. Reinstall the processor board 3 in the server:
a. Locate the appropriate processor-board connector ( 2 or
4 ) on the system board 1 . Install the first processor
board in the primary connector 2 . Install the second
processor board in the secondary connector 4 .
1
2
3
4
Chapter 4. Installing Options 97