Sorry I got swamped at work yesterday and never got back to sending the diagrams. Have sent now but had to break up into 8 bits due to attachment size limits I have.
Have only had a quick look but Power distribution (incl ignition switch etc ) is on diag 2. Starting and charging (3A or B depending if LHD or RHD) shows the black/Blue (SW BL) going through the Anti theft relay to the starter - Black Red (SW RT)
German colour codes are shown middle left of diag 1 - explanations. All of the above are in diag's 1-10. 2-20 and 3-30 have the engine management drawings but in the quick look I had, I see mostly EEC 1V and not sure if Cosworth is there or not.
Hope they help
David