Predicted (green arrows) and observed (cyan dashed circles) positions for multiple lensed images 5.1e, 5.2e (left panel), and 49.1c (right panel). These multiple images were not detected originally and have been found by visually inspecting the data-cube around the positions predicted by the strong-lensing model. Note: System 49 is a Lyman-α emitter that is too faint to be visible in the RGB cutout, but it is clearly visible in the spectral data-cube (see the spectrum plots for system 49 in Fig. C.11).