1. Open the right door of the unit.
  2. Pull out the locking lever [A] (x1).
  3. Align the right side of the unit with the docking brackets [B] and [C] on the left side of the main machine, and then slowly push the unit onto the brackets.
  4. Connect the unit’s I/F cable [D] to the main machine.
  5. Push in the locking lever and check that it slides into the slots of the docking brackets.
  6. Check that the top edge of the unit is parallel with the left edge of the main machine.
  7. Refasten the locking lever [A] (x1) and close the right front door.