i'm going to install a stereo deck in my boat and i'm not a stereo guy. so any advice on how to wire it up would be appriciated. It did have stereo at one point becuase there's a engine noise reducer in the boat. just want to make sure i install correctly.

they're pretty self explanatory.  need a +12v, then a switched +12v if you want it.  i personally dont want to turn the ignition on just to have tunes so im going to wire mine so i can JUST run the radio.  and then a ground.  the rest of the grey/purple/white/green go to the speakers.   crimp tool and a bunch of butt connectors later and you'll be blastin that ricky martin in no time.