HKS twin spark oldschool unit

[AceSniper]

Just wondering if any one knows what wires are what or how to work out the wireing of a old late 80's? HKS twn spark unit, its a solid red brick with these wires...

square plug

1 2 3
7
4 5 6

1 Orange
2 Black
3 Red
4 Green
5 orange
6 red
7 yellow

plus one earth

cheers