IBM 3270 Hardware User's Manual page 44

Setting Up a Monochrome Display
1.
Place the display on your desk.
o
Monochrome Display
2. Connect the display cable to the connector in
slot 3 on the back of the system unit, and
tighten the screws. Slot 3 is the third slot
from the right.
Chapter 2. Setting Up and Checking Your 3270 PC 2-27