NOTES, do not show the power connections, do not show NMEA 2000 or NMEA 0183 connections - gps receiver | Garmin GPSMAP 7215 | Installation Instructions (Page 11)
Installing a NMEA 0183 GPS Antenna (HVS) to a Garmin Chartplotter | Garmin Customer Support
nema
Installing a NMEA 0183 GPS Antenna (HVS) to a Garmin Chartplotter | Garmin Customer Support