Move a character.

[Ower]

Could someone give me a hint on how to determine the coordinates for the move_character cheat?
In my recent Aedui campain (after the previous was shoot down by a strange CTD) I am about to finish off the Arweni in Gaul. but in the last turn Ankyra rebelet to them (from Pontos) I would love to create the Galatians - but there is no FM there, so I want to move the Arveni leader from the besieged Gergovia to Ankyra.