I think this cannot be done with an APEXI RSM. As I've checked there is no RPM output from ecu or meter cluster. I assume that the ECU uses crank signal to output RPM signal directly to meter cluster via CAN BUS system. So unfortunately the RSM will not work for your vehicle.
Unless you tap into one of the ignition coils signal and set the RSM to 2 cylinder and see what happens. I doubt that you will get accurate RPM readings.