Should be missing the blue wire, a circuit to stop power spikes hurting the box, the later ones quickly did away with that to use only six wires. Since most like that the aftermarket has probably quit making the early one. Making that 3 wire connector simply drop to 2, plug it in. The problem is they changed up the other 4 wire connector, same wires/colors but in different positions and a problem for you.
White is power from ignition switch at start, red is power from ignition on run. Green is to coil minus side, black is ground to module, not to a metal ground. Purple and orange are from distributor pickup, but must be correct, reversed they throw timing way off (22 degrees). Blue if present is plus side coil power after the resistor.
Or go back and lookup earlier model say '74 or try '75 again, my stuff says the later 'six wire no blue' came in '76, that '74-'75 use the extra seventh blue wire. Real world may have occurred midyear '75 there.