Centralized closing installation with universal command, Nissan Primera P11

Hello colleagues.
Let's see if you can do a hand.
I have recently bought a remote control switchboard for my centralized closure. But I don't know where the original car is located and if the connection is negative, positive or negative/positive.
My car is a Nissan First P11. If anyone has put a remote switchboard to his Nissan Primera P11 I could explain how I can do it.

Thank you so much.

Greetings Sento.

Hi, I'm in the same case, you solve the problem, you could tell me how to connect it, thanks