[Ray]

I have always installed it in the stock OEM location either replacing the stock sensor directly or when the 1/8 bsp did not work on the 1/8 npt using a ferrel adaptor with a 1/8 npt thread that tappered at the end and carefully starting it in with minimum force. They have never leaked and proven to be right on the temperature range for our cars. I will try to take a picture later for you.
Seeing as you bought the adaptor I have no experience with them. Make sure the black wire is attached to black and the white to white. I think you may need to ground your adaptor to the car for the sensor to work properly, just run a wire from the adaptor frame to a near by metal ground part of the car.