Aslamualaikum Tanveer Bhai ...Long time no see ..
The GPS sensor has to be installed in this position. However, the installer has done weird job. He just did not bother to open the speedometer and install it behind it ..
This looks bad and clutters the dashboard top ... Kindly go to him and ask him to install it in its proper place.
You cannot place it onto the side pillar ... it has to stay like this, but under the top of the dashboard and behind the speedometer cluster