Identification of the group members and multiple images, along with the X-shooter slit configuration. (a) grz color composite image of the system, the red labels indicate possible group members, and the white box represents the X-shooter slit passing through image S1a.1 and between members g2 and g3. (b) g-band image with Sérsic surface brightness model of g1 to g5 subtracted, overlaid with the segmentation of the multiple images labeled in black.