Sky-projected system orientation compared to radio observation. The contour levels is a stereogram view of the ¹²CO J = 2−1 high-velocity emission. The contour levels are drawn at 6, 8, and 10 mJy beam⁻¹ for two maps equally shifted by ±100 km s⁻¹ from the centre-of-mass velocity. The blue-shifted contours are displayed in blue, and the red-shifted in red. The dashed green line represents the orbital line of node, the black arrow the jet axis and the dashed black line sketches the cone edges.