Lensing configurations of the two 2L2S models. Notations are same as those in Fig. 3, except that there are two source trajectories, which are marked by S₁ for the primary source and S₂ for the secondary source. The two source trajectories in the main panel are difficult to distinguish due to the closeness of the trajectories, and thus we present the enlargement of the central region in the inset. The trajectories of the primary (S₁) and secondary (S₂) source stars are marked in black and blue lines, respectively. The empty circles on the individual source trajectories indicate the source sizes estimated from the 2L2S modeling.