Originally Posted by VABAM

Easy fix, the pics were very helpful.
You have the pins backwards for the control wires.

You have:
Pin 4 of M67 going to pin 6 of M66 (green)
Pin 5 of M67 going to pin 7 of M66 (white)

It should be:
Pin 5 of M67 going to pin 6 of M66
Pin 4 of M67 going to pin 7 of M66

I think you miss read the pin-outs. You wired the control TX (transmit) signal pin on one plug to the TX pin on the other. It should be TX to RX (receive) like plugging in an AV source to a head unit; the output of the source (TX) to the input of the head unit (RX).

Swap the green and white wires on one of the plugs and you should be go to go.