Shadow Copies on Cluster Shared Volumes

Hi

I've got a CSV (C:\ClusterStorage) for my Hyper-V with 4 volume.
i've enable shadow copies on C:\ drive but on C:\ClusterStorage folder, i can't see the previous verison. 

i understand that C:\ClusterStorage folder is not "really" host on C:\ drive but how can i enable vss (if it's possible ...) ?

Thanks

Regards