I have received my 598 si back with no problems listed so I am re installing the unit and would like some input. My old unit was attached to trolling motor and this will also. The power hook up is what I want to address. The panel on the bow of the boat has buttons for tilt, lights, and live well. My old unit got its power from the back of this panel with a 3 amp fuse inline. When I first installed I simply used this hook up without putting the new power cord on as the old on fit. I am wondering if this was the cause of the distortions. So I want to now use the new power cord since it has a round something installed on the cord that the old on did not. (Good terms right). Is this ok to do as the old one was hooked into this panel, or should I hook up power different?