CO(2–1) emission (blue and red contours) overlaid on top of SiO(5–4) emission from Paper I (color scale with white contours). Both maps were cleaned with the same beam of at PA = 20° (cf. filled ellipse in lower left corner). a) (Left panel) Medium-velocity (MV) emission, integrated over [–9.5, –1.5] km s^-1 (blue), and [+3.5, +9.5] km s^-1 (red). CO contours range from 6σ (13 K km s^-1) to 78σ by 6σ. SiO contours range from 6σ (74 K km s^-1) to 18σ by 3σ. b) (Right panel) High-velocity (HV) emission integrated over [–16.5, –9.5] km s^-1 (blue), and [+9.5, +12.5] km s^-1 (red). CO contours range from 6σ (1.4 and 1.1 K km s^-1 for blue and red, respectively) to 13σ by 1σ. SiO contours range from 6σ (21.5 K km s^-1) to 21σ by 3σ. In both panels, 1.4 mm continuum from the central source MM1 is shown in light-blue contours, ranging from 10σ (5 mJy beam^-1) to 70σ by steps of 10σ.