aeroelasti

hi all, was changing my lightbulb and notice that my wiring for parking sensor has come loose... Picture above is what I found from the Internet:

But 4 of mine has come loose. Top 2 photos. The 2 blues and the 2 middles. I bought the car with the parking sensor fitted, so no manual with me or anything. Top 2 photos is mine in the current state, how do I know which colour to plug in where? Can anyone kindly trace the wires back further and advise? If your car also has parking sensor fitted. Thanks