they all have rear speakers. the cables will be tucked away inthe back area.
as for removal of the original, pop the AC vents out - 2 screws, pull ashtray out - 1 screw, pop out panel - 2screws, remove radio.
you will also need an antenna adapter ($15) and harness adapter.($15) to make things work.
if you need these bits fire me a PM ( I sell them.)