so I was gifted a global map I read the instructions it tells me to keep the power hook up away from other electronics. with a DR,3elec.riggers,trolling motor, fish locater, marine radio, on a 16'boat there is little chance of I just hook it up if it works gr8 if not go back to lowrance H20 handheld? also what do I do with NMEA/DGPS wires that i'm not using? can I just wrap n stow? thank you, safety n tight lines to all taimen