Migrating administrator approved infopath forms

Hi,

I need to move all administrative approved infopath froms from 2010 to test 2013 environment. I am confused where these .xsn files are stored in sharepoint server, if they are stored there at all? what would be best way to migrate those ? I do not want to ask end users for these requirements but have no idea what so ever where they are stored.

Adit