SIMRAD Robertson AP300DX to Furuno SCX21 integration question.

[DaleRox]

I have a SIMRAD Robertson AP300DX Auto Pilot (NEMA 0183), a SIMRAD NI300X NMEA 0183 to NEMA 2000 Interface Unit and a Garmin GPSMAP 8616 MFD Chart plotter. The question is should I wire the SCX21 into the SIMRAD NI300X 0183 interface or should I connect it directly into my NEMA 2000 Network? If I wire the SCX21 into the NEMA 2000 Network I will be able to run the SIMRAD Robertson AP300DX directly into the Garmin GPSMAP 8616 Chart plotter, eliminating the SIMRAD NI300X 0183 interface unit. The Chart Plotter does have a NEMA0183 connection along with a NEMA 2000 connection, what is your recommendation for connecting the SCX21