Dash grab handle on my VS is 5 1/2"s from the edge of the door jamb. The way it curves at the bottom of the handle to fit the dash dictates the vertical position. the bottom should fit fast against the surface of the curved dash.
The top horizontal deco piece of the Porsche logo is 6 1/2"s from the edge of the jamb and the word Porsche is centered vertically between the bottom of the dash and the bottom of the padding at the top of the dash.