First photo shows the wires colours atatched to the black device.
How the wires go:
- green goes to headlamp/horn control switch on steering wheel (second photo)
- first green/black goes from headlamp/horn control switch
- second green/black goes from to the horn
- black goes from black device to headlamp second switch (red circle in last photo)
Im not sure if one of those wires goes to flywheel magneto. Is it possible that this black device is just indicators/horn control device? The moped without this black device has indicators control device - shown in first post, green box. But another moped (the same model as discussed here but with home made indicators) has either indicators control device and the black mysterious device.