i am trying to remember, look at it end on and its a matter of prising the outer part out so that the little built in knobs clear and pull on the wires and the inner will slide out?? by the way, there is no need to have the bluetooth module in the armrest, you could cut it off in the armrest with above say 6inches of wire and splice all the wires in the boot. mine works anywere in the boot and up to 5metres from the car. it saves having to thread wires to the centre consol for no reason except thats were it always was. good luck its well worth it.