The 10pin flat cable is for some old motherboards that don't have DB-9 male connector on board. Besides, N1200 board comes with 8 pin header only, that's why I said 9-10 not connected.
If you custom-made a cable, only 3 wires are required. Pin 2, 3 and 5. Since the null cable is for Rx/Tx crossing, so if you still find the console does not display, just swap pin 2 and pin 3 and try again.