IBM RT PC Options Installation page 104

2-60 Options Installation
c. Pull the faceplate off the two bolts holding it in place.
3. Remove the cooling fan assembly. See "Cooling Fan Removal" on
page 2-5.
4. Turn the diskette drive upside down and locate the terminating
resistor.
Warning: Do not bend the pins!
5. Insert a small, flat-bladed screwdriver under the resistor and lift.
Alternate ends of the resistor to lift evenly.