Maps of the integrated intensity of the ¹³CO(6–5), (8–7) and (10–9) transitions in the velocity range v_LSR = [−54, −40] km s^-1 (colour scale). The solid contours in the left panel represent the LABOCA continuum emission at 870 μm from 5% of the peak emission in steps of 10% (Schuller et al. 2009). In the middle and right panels, the solid contours are the integrated intensity of the ¹³CO(6–5) from 20% of the peak emission in steps of 10%. In each panel, the positions analysed in Sect. 4.2 (the hot core, the IRDC position, and the centre of the Hii region) are marked with black triangles (except in the left panel, where the hot core is shown by a white triangle). The red star labels the position of the EGO.