Door lock actuator and keyless entry

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8
Hello, whats the second connector for the door lock actuator using 3 pins on the ep3 type r? Why do some models not have it? It works fine connecting only the 2 pin connector.
Also seeking help why key fob keeps forgetting programming every few hours. Should I change the receiver unit or perhaps the fob? This started happening after jump starting it first time after the winter.
Thanks
 
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