I have had a cable in my glove box since purchasing my car several years ago. Recently I removed the audio unit and found the cable would fit into an unused plug on the rear of the unit. The cable has a ford part number tag on it 1R23-19A442-CA. The cable has a 3pin connection on the other end, it has a 12 pin plug to connect to the audio unit but only uses 3. Pink, green and yellow/blue are the wire colours and the cable is about 30cm long. The audio unit part number is 1R23-18C815-BATFA. Would like to know what this cable is for, any clues?