IBM 1800409-001A - Manual (Page 293)

6. Line up the notch on the 220-ohm DIP resistor with the notch
on the RP1 socket. Carefully insert the resistor’s pins in the
socket. Then align and install the 330-ohm DIP resistor in the
RP2 socket the same way (fig. 8.24).
330 ohm
220 ohm
RP2
RP1
Fig. 8.24 Insert the New DIP Resistors
Chapter 8
P r i n t e r O p t i o n s 8 - 3 7