Ford Ka radio diagram ?

Hi. Im trying to install a new radio in my ford ka . there are 2 plugs , one for tje speakers and one with 5 wires. One is green \black ( thick ) , one is brown\black ,one is blue \black , one is yellow\ black and one is brown \black ( medium thickness ) . my new radiobonly need a ground ,auto antenna , power wire and a ACC . please can someone help me with the colour sorting ????