OwnBack up seeding template for Person account

I am creating load the data from OwnBack up to sandbox using seeding template.  trying to load Is Person Account=true Account related Tasks  and also Is Person Account=true Contact related Tasks(Some of the tasks are directly tied to the Contacts with who).      Trying to figure out the object mapping.    Root  -- Account(Is PersonAccount=true) -->Child-->Task                                                                      Child-->Event  -- Contact(Is PersonAccount=true)-->Child-->Task                                                               -->Child-->Event  Is this correct order of mapping. I am I missing anything.  Can anyone help to figure out.