Ricoh Aficio MP C3501

G3 Interface Unit (D393)
D393 18 SM
6. Remove the "LINE2" cover with a screwdriver.
7. Attach the socket of harness [A] (LINE2) to the modular bracket [B] for SG3.
8. Connect the harness [A] to the SG3 interface unit [B] (= x 4).
9. Attach the modular bracket for SG3 to the controller box ( x 2).
10. Reinstall the controller box.