A 45-year-old woman with a history of two prior cesarean sections presents with chronic pelvic pain and a palpable pelvic mass. Axial CT pelvis is performed. The structure marked **A** in the diagram is noted to be anteriorly positioned and flexed forward. During preoperative planning for suspected fibroid hysterectomy, the surgeon reviews the CT carefully. Which of the following anatomical relationships of the structure marked **A** carries the HIGHEST risk of iatrogenic ureteric injury during the planned procedure?