Goddess of War alternative weapon/animation

[missfortune1]

http://www.hiveworkshop.com/forums/models-530/goddess-war-201005/?prev=search=of%20war&d=list&r=20 this is the model
I haven't understand how can I use the alternative weapon style the basic is dual weapons, how can i use the two handed?

 

[-Grendel]

use it an ability that is morphing. metamorphosis, crow/bear form are some examples