Fronius Torch Payload

I received the specification of the welding torch from fronius, but I do not know what values to use to set the payload at Fanuc robot ArcMate 120iD.

I have to choose between:

1. Inertia Relating to the Coordinate System XYZ (kg/mm2)

2. Intertia in the Center of Gravity relating to the coordinate frame XYZ (kg/mm2)