Suite: mass models for the J095930.93+023427.7. Top left panel: the navy blue circle located north of the image surrounds the group central galaxy. Top right panel: zoom on the lens galaxy and on the images. Bottom panel: zoom on the caustic (yellow curves) and on the favorite source position (green ellipses). The color code for the labels is given in Fig. 7. North is to the top and East to the left.