The radio P20 is supplied directly (4 of connector A) from the battery via the line for fuse F51 of the Body Computer M1.Pin 8 of connector A is earthed.Pins 1 and 3 of connector A connect to the CAN that connects the radio P20 to the Body Computer M1 (pins 5 and 20 of connector D) and to the other system nodes.The Body Computer M1 is connected to the radio controls on the steering wheel via the clock spring D47: pin 35 of connector D supplies a reference earth to pin 7 of D47; pin 52 of connector D of M1 receives signals from the pushbuttons located to the left of the steering wheel while pin 50 of connector D of M1 receives signals from the pushbuttons on the left of the steering wheel.The Body Computer M1 - connector G - is supplied directly from the battery via a line protected by maxifuse F2 of the engine compartment control unit B1; its ignition-controlled supply (INT) is received at pin 2 of connector D; pin 10 of connector H or M1 supplies the Body Computer with a reference earth.The following cables with signals for the speakers leave connector B of P20:- pins 5 and 6 to the left front speakers P35 and P45 (or P36 and P46 on right hand drive versions);- pins 3 and 4 to the right front speakers P36 and P46 (or P35 and P45 on right hand drive versions);- pins 7 and 8 to the left rear speaker P30;- pins 1 and 2 to the right rear speaker P31;The aerial P25 is connected to the radio by means of the special coaxial cable.