Same field as in Fig. 2, shown in CO (6−5) (colours) convolved at the 24′′ resolution. The half-maximum contours of the emission of the CO (3−2) (black line), (4–3) (red), (6–5) (green), and (7–6) (blue) lines is also shown at the same 24′′ resolution. The SiO peak and knot, HH320 AB and knot 5 positions, as well as the beam sizes of the (6–5), (16–15) and (11–10) transitions are also indicated as in Fig. 2.