Centralized closure and BMW 325i E36 alarm

I have problems with the centralized and alarm closure of my BMW 325i E36, since I bought it a year ago, it never worked, or with the key, the only thing that you notice is that it does not have is the closing sensor because they changed the rearview mirror, from there it has everything at least at least what I understand, someone could pass me the electrical scheme or how I work even if it is the closure for the doors. Pins and I have no idea what they have fun, thank you very much and cordial greetings