Re: furuno nmea connection????
I have a Furuno 582L. If the 600L is like the 582L, which I'm 99.9% sure, TX is on pins 1 and 2 and the RD is on pins 3 and 4 on the NMEA cable.
They don't give wire colors so you'll have to "buzz out" the cable to determine which wire is connected to which pin in the connector. Pin numbers should be marked on the connector.
You'll need to go into the system menu and turn on NMEA. The default is for NMEA to be off
I can't help you on the Ray side. Running a Garmin 4208 chart plotter.