Just got a garmin ultra 126sv and livescope 34 plus. Before I start my install, I'm looking for any insight on anything to watch out for, mistakes, shortcut?, things to make sure you do ect. For now I plan on using my third battery, that's in the back, just for livescope. May add the garmin 126 to this battery too. The battery is 2 years old, has been my spare for just in case, but never used. Plan to attach the livescope to my trolling motor for now. Have watched some YouTube videos. Thanks for any input.