So i removed my A/C unit from my dash today to clean everything.
I founded conector behind being unused or pluged to anything.Do anybody knows what is that conector for??

That is the one on left side..

 

I think that is the connector for the mobile phone.
If I remember correct it has both a switched and unswitched 12V power source

 

On U.S. model's that won't go to anything

 

well my car was imported from canada so i dont know if thats mean anything.

 

The Canada cars just have different programming, for your car there would be a control unit above the airbag control unit and an extension harness over to the passenger side of the console that a big phone attatchment would be, but that set-up wasn't sold in the U.S. There was a retrofit kit available for it but it would be ovious because of the extension harness that plugged into the connector in your photo's