Sketch of the reconstructed 3D accretion geometry for the cluster environment. The horizontal direction shows a cut through the main SE-NW cluster axis, whereas the tentative radial (i.e. redshift space) distances are plotted along the vertical axis for components I − V. The nominal cluster center is indicated by the central cross, the positions of the BCG and BCG2 by dots, and the reference radii R₂₀₀ and R₅₀₀ by the solid and dashed circles. The physical scale in the cluster reference frame is given in the upper left corner and the value in the lower part refers to the comoving distance to the cluster in the assumed cosmology. Green arrows indicate schematically the approximate traversed distance within 200 Myr for linearly extrapolated trajectories under the assumption of matter infall velocities of 2500 km s^-1 for the central merging group II (see Sect. 4.4) and fiducial reference values of 1000 km s^-1 for the outer components (III, IV, V).