Trouble Mapping Newton Subsea Gripper Buttons

Hello,
My team is working on trying to control both of pur Newton Subsea Grippers. We have the signal wires plugged into AUX 1 and 2, and in trouble shooting we plugged it into AUX 3. However, when we go to map the necessary buttons for the gripper, Servo_n_min_momentary and Servo_n_max_momentary do not show. We are unsure of what may cause this problem. Does anyone have any suggestions?