For the 5C and 5M leads there you only really need 2 wires, I'm guessing the 4 wires are paralleled up inside the male plug that goes to the master speaker.
In the 180 degree plugs pin 5 is the signal and pin 2 is the return.
In the 240 degree plugs pin 4 is the signal and pin 3 is the return.

You'll have to 'buzz' out the wires to see what wire is connected to what pins at the two socket ends.

Steve.