Histogram of the angle difference between semimajor axis of the nebula and direction of the megaparsec-scale SMG distribution α_RMS, color-coded by the number of quasars in the center of the field. The angles are compiled from Arrigoni Battaia et al. (2023), Herwig et al. (2024), and Table 2, and are restricted to the range [0° ,90°). The median angle offset of 25° (46°) for single (multiple) quasar fields is marked by the vertical black (gray) line.