I have a spool of Ancor instrument wire. 2 conductor, shielded with a bleed off wire. Then I was looking at the Garmin website and it shows a special connector/plug for all this wiring. I had not planned on using anything other than solder and shrink tube?I figured doing a separate run in and out.

As far as the radio, my user manual says that the radio will transmit distress call locations to the plotter which show up as a special symbol?