IBM R31 - Manual (Page 117)

Pivot the memory card until it snaps into place.
Side View
1040 Hard disk drive assembly
v “1010 Battery assembly” on page 108
1
2
Step Size (Quantity) Color Torque
1 M3 x L4 (1) Black 3.2 kgf-cm
MT 2656, 2657, 2676 111