tdci bulkhead wiring

Hi does anyone know how the central locking circuit in a tdci bulkhead works? I've put one on my 300 tdi and I'm wondering if I'll be able to use the existing central locking wiring and just put a new signal receiver on it or if I'll have to put in new wiring? I don't know if it would have been ecu controlled or anything I'm struggling to find much info
Thanks