Peugeot 306 1.9 90cv xsdt coupe crazy alarm

Hello good, I tell you a Peugeot 306 of 98 that I bought I has the following problem the alarm is disconnected where the engine I when trying to plug the connector in any way the jumper and alarm is activated alone that I can do to fix the car is fine with start code interior detector detectors so that said alarm would peel etc. I would like to put it into operation thanks.