Wiring Ditchlights in Atlas Dash 8-40CW


I'm restoring an old Atlas Dash 8-40CW and I need help connecting the lights. As you can see in the picture I have the 5-pin connector with wires in blue, brown, black, orange and red. I found that the red wire is the + 5V pin 1 and the headlight is pin 2 orange. Now the question is how to connect the remaining 3 wires in the ditchlights to the chassis contacts. Can someone help me?

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