Connecting devices? Simrad, Furuno Radar, chart plotter

[Wistlindixie]

This is a probably a complicated request. I have a purchased boat that came with the following:

Simrad AP26
Simrad ac20 autopilot computer
Garmin GPSmap 741xs
Furuno GP-39
Furuno radar and chart plotter nav net bx2 c-map NT max

I have radar, but no GPS on the chart plotter that thinks it is in FL. The Furuno GP-39 seems to have GPS, not easy to use. The Garmin 741 has GPS works good. I would like to have the chart plotter connected to the autopilot and all work.