It depend on which 3d software used and which method to convert.
Are there no coordinate available in your 3d software?
I have never used meshwizard as the soft I use can give all the needed coordinates. (0,0,0) is where the cog will usually be after export, but I can only confirm that for 3dsmax and the max2mesh script.
The longest method is by guess and trials, using exhausts if no other way but it still works.