For Christmas my children gave me a Standard Horizon CP150 Chart Plotter. I was so excited that I read the owner''s manual start to finish. Now I''m anxious, because the installation instructions seem very general and my understanding of the wiring is very basic. My wife & I just purchased our first boat, a 1980 Irwin 30, that''s equipped with an Autohelm ST4000. I''d like to interface the GPS to the Autohelm. The CP150 instructions suggest that all one has to do is connect the right color of wires together... Can it be that simple?