Best-fit source positions of the channelised models of [CI](2−1) (top) and CO(7−6) (bottom) in SPT0103−45. The velocity scaled is the central velocity of each of the bins. The black square and cross, represent the positions of the extended and compact component from the continuum model, respectively. The ellipses represent the half-light ellipses of each of the model. The lensing caustics are shown in grey.