G35.20w SCUBA archival 850 μm polarization vectors rotated by 90° to show the magnetic field orientation, overlaid on SCUBA 850 μm dust continuum archival data (color scale). The position offsets are w.r.t. the coordinates given in Table 1. The box shows the region around our IRAM 30 m CN observations to which we confine our analysis. Polarization data is only shown where the polarization level is ≥3σ, corresponding to an uncertainty in position angle ≤9.5°. The length of the B_pos vector represents the percentage of polarization.