Where is the torque measurement location point in the Torque-Current graph of the Performance Graph?

Hello, I am currently using the Torque-Current graph from the Performance Graph to measure the torque of the XM430-W350-T. However, I am unsure whether the torque data presented in the graph was measured at the motor shaft (before the force is transmitted through the gear) or at the horn (after the force is transmitted through the gear).

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DYNAMIXEL Servo: XM430-W350-T