SMA and ALMA maps are roughly comparable with values of $\sim$1.65 Jy and $\sim$1.02 Jy respectively, some differences in the polarized emission distribution are worth mentioning. Hence, the strong submillimeter emission in the region “D” (seen with the SMA) is no longer visible in the ALMA data. In addition we observe other discrepancies in the polarization distribution between both maps. Indeed, the strong central polarization in the region A seems to be missing in the ALMA map and conversely the strong polarization in region B1 (seen with ALMA) is not present in the SMA map. We excluded the ”contamination” of our previous SMA maps by some line polarization and conducted independent ALMA data re-reductions. The reason for the absence of structures seen with the SMA (at lower resolution) in the ALMA map (having a higher resolution) is not clear.

A large scale toroidal field component {#reg2}
--------------------------------------

The southern part of the magnetic hourglass structure observed with ALMA, and even the SMA, appears to be surrounded or embedded within a wide toroidal like pattern, with a size of $\sim$6$\times$7, located at larger scale. This can be seen through the orientation of the $\overrightarrow{B}$-vectors in the CARMA image @Sabin2015b (Fig.\[CompB\]-left). This 