There are two of this part per modified International truck and should be located in the RH lower quadrant behind the center section of the dash. (See photo).
One is for the throttle circuits, connecting to a harness with 1 red, 1 white, and 6 purple wires. The other is for the multi-function stalk circuits (turn signals, wipers, etc.), connecting to harness with 1 red, 1 white, 6 orange and 9 gray wires.