HP 98568A Installation Instruction page 85

HP 98248B Floating-Point Accelerator
Figure 4-2. Floating-Point Accelerator Bus Cable Positioning
8. Slide the Accelerator into the empty slot. Slide the end with the two
DIO-II connectors in first. Hold the FPA Bus Cable out so that it remains
out of the computer.
9. Rearrange the other boards in the backplane so that the processor board is
directly above the Accelerator and the RAM board( s) are directly above
the processor board.
10. Slide the processor board out about 1 inch.
11. Locate the FPA Bus Cable connectors on the processor board. They are
directly above the cable protruding from the Accelerator.
12. Wrap the FPA Bus Cable around the back of the processor board, and
attach it to the connectors on the processor board. The cable will become
S-shaped, as in the side view in Figure 4-3.
Adding Accessory Cards 4-9