Continuum maps in the four frequency setups of PJ231−20 (upper panels), and the two setups of system PJ308−21 (lower panels). The central frequencies of each setup are reported at the top of each panel. The white ellipses indicate the ALMA FWHM synthesized beam. The positions of the quasars and the companions from which we extracted the spectra from line cubes are marked by cyan and white crosses, respectively. The solid contours indicate [2, 4, 8, 16, 32, 64] × σ, and dashed contours are the −2σ value.