Total projected mass distribution in units of 10⁹ M_⊙ kpc⁻² and the central position of the three cluster halos (black + markers), overlaid onto an F814W image (upper panel) and cumulative total median mass profile as a function of the distance R from the BCG 273 (middle panel). Vertical lines mark the radial distance of the multiple images: the golden sample used to optimize the lens model is indicated in gold and other multiple images are indicated by the gray dashed lines. Cumulative mass profiles for the cluster members, including the two BCGs, (in blue), and for the cluster halos (in red) are also shown, along with their ratio with the total mass profile (lower panel). The shaded area indicates, for each mass component, the ±1σ interval. Magenta dashed lines indicate the cluster Einstein radius (θ_E) and the total mass enclosed by the corresponding critical curve (M_E) for a source at a redshift of z_s = 2.