Mock data sets of the lensing imaging and kinematic data. We observed a faint satellite galaxy above the lens galaxy at the same redshift as the lens galaxy. We neglected the satellite when we simulated the IFU data. The satellite is too small to extract useful kinematic information from the IFU datacube other than the redshift (see Shajib et al. 2025). More importantly, based on the previous study, the satellite has a negligible effect on mass modeling and cosmological distance inference (Suyu et al. 2014). The mock IFU data with 52 bins are presented in the same reference frame as the simulated HST imaging. North is up, and east is to the left.