Hi everyone first time author, I just installed a brand new marine stereo, replaced a old maxxima marine stereo since the older connections dont work with newer stereos i tried to splice wires into the old connectors and nothing worked, i have a red wire/yellow wire and black ground wire and of course speaker wires i ended up splicing the red and yellow together and going directly to +pos on battery and ground to -neg on battery my concern is ( I only have 1 battery) killing the battery my thoughts are if radio is turned off i shouldn't draw juice from the battery except the Yellow/memory wire, should i add a toggle switch and if so would both red/yellow connect on same post of toggle