Found this document, might be worth reading, not sure I would go with the ring terminals though, hate them and if I do use them I use the F Type. At the end of the day it is all too complicated for me.
https://www.navcen.uscg.gov/pdf/gmds...rce/NMEA_7.pdf
And this one was a little more helpful
http://boat-project.com/tutorials/nmea0183xcon.htm