Zoom-in of Fig. 2 towards SMM 5, 6, and 7 for which some of the spectral lines are seen in absorption. Only the 3σ and 6σ LABOCA contours are plotted for clarity. Besides the clumps SMM 5, 6, and 7, also the striation seen as a dark absorption feature is labelled (cf. Fig. 1, where the striation is seen in dust emission). The red plus signs indicate the target positions of the present spectral line observations, while the yellow diamond symbols show the positions of the WISE sources seen towards SMM 6 and SMM 7. The latter one is likely to be an extragalactic object, thatis a star-forming galaxy or an active galactic nucleus, and hence SMM 7 is considered an IR dark clump (Miettinen 2018). A scale bar of 0.5 pc projected length, and the beam size at the tuning frequency of the present spectral lineobservations are shown in the bottom left corner.