IBM RT PC Options Installation page 84

Removing Fixed-Disk in Position E
Follow these instructions to remove the fixed-disk drive installed in drive
position E:
1. Remove the screw holding the drive adapter in adapter slot 2. Slide the
adapter out of the slot.
2. Disconnect the 34-pin connector C-E and the 20-pin connector C-El.
20 Pin Connector
EI
To Fixed-Disk Drive
34 Pin Connector
E
Section 2. Removing and Installing Drives in IBM 6150 2-43