How to instal Fermax 2451? HELP PLEASE! - Questions - Nuki Developers

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Hello all, Please, in my house I have a FERMAX 2451 Citymax version 2.5 (as you can see in the image). It’s very old. The cables are not connected and I need to connect them. As you can see I have letters and symbols: T_ T -A +A - L + And also I have 5 free cable colors: RED, YELLOW, WHITE, BLUE and GREEN. I don’t know how to connect them (colors with the letters). It’s a simple phone without camera. Just a ring bell. Can someone help me please?? Please please please! it is very