I have a 2009 Ka Mk.1 1.3 Collection fitted with key operated central locking. Here in South Africa no Ford Ka was sold with remote central locking as standard (all Ford Ka's sold in South Africa where imported)

I would really like to fit a factory remote central locking to my Ka. How do I check if my wiring loom contains the wiring for a remote central locking receiver/controller? Secondly if it does contain the correct wiring, what parts would I need to order (EG: the controller/reciever, remote key etc.) and lastly how hard are they to fit???