okay im pretty okay at installing my own sub and amps and speakers and wat not, but the only problem that i have is that i dont know how to make it look clean so that you wouldnt see any wires all over the place... just looking at the inside of my trunk being all messy with wires just bugs the hell out of me. so wat could i do thats very simple to make my setup look clean.

this is a pic from the back when i fold down the back seats.

 

just unmount all those panels and hide it behind that. You can also buy meterware of polstering stuff and hide it behind that.
In defender it is very simple becuase it doesnt have that many one time usefull pins, but mostly screws holding all in place.