Analogue Fume Extractor - Technical Support

I have an interfacing cable on my machine for remote start and alarm warnings. One end of the cable has four wires, can you tell me which wire does what please?

The wire colours for the no plug fitted cable are as follows:

Yellow and green wires = remote start stop – volt free contacts required to close these wires to start (+12VDC signal)
Red and blue wires = alarm signal – output via a set of volt free contacts inside Purex extractor

I hope this helps.