ALMA continuum-subtracted [C II] maps. The continuum black/dashed grey contours highlights the ±2σ, 4σ, 8σ.. levels. The beam size is shown with a white ellipse, while the rest-frame UV/optical position of the quasar is reported with a black cross. The morphology of all the sources is broadly consistent with the beam size; hence, we consider them to be unresolved at the spatial resolution and S/N of this dataset.