on the power plug there is 2 black and grey wires cut them and wire it to your blue trigger wire on your new head unit you will have to cut the speaker wire plug to fit a standard iso unit and away you go
we are all entitled to an opinion but £500 for overfinch alloys( do your research) i can sell them today for a fat profit because that is what i do buy and sell and to decide i dont have any sense without meeting me is that an educated guess ?