Actually..confused myself now. Theres Bat, ACC and ignition.
Sooo... I assume ignition actual tells tell the unit whether to be alive or not. But accessories is additional power to the ICC?.
Dunno.. but the Mobil phone connector is of interest now that I know where it is. Pretty sure I got the connector during my harness scavenging.
Which also has the standard:
Yellow: Battery
Black Yellow: ACC
Black : Ground
And also the mute and audio wires but not of interest so far.
Time to start wiring!