Bob, I am probably not helping here, but knowing the functions of the light spots, you can probably work out the wires in the connector with multimeter, or tell what they are supposed to be.
If you have /8 BBB (108 109 111 113 for 1966-1973) the wiring diagrams there for 280SE/9 3.5, 280SEL/9 3.5 and 300SEL/9 3.5 have colours of the wires marked.