Location of NFC reader on Precision 7670

The optional NFC sensor is located under the surface of the touchpad.

>The optional NFC sensor is located under the surface of the touchpad.

Thank you for the answer but it is not enough. I suspect that it located under the surface of the touchpad but I cant find it. Mobile cant read it (try few locations), Card reder application shows the cardless reader but doesn't show the card (also tryed few location). So I want to know the exact point on the surface under keyboard.

That is unknown. None of the available documentation to me states, "exact point on the surface under keyboard". Other users will need to post their findings.

Precision 7670 Documentation

Usually the NFC sensor is just to the right of the touch pad, this seems to be how they are installed in machines I have with them added

The connector also requires the motherboard to be out to connect the cable etc, watch for lost screws