migrating ESXi 5.1 VMs to ESXi 6.0

i had ESXi 5.1 running, removed those VMs from inventory, then booted up ESXi "6.0.0.update01-3029758". created a datastore on the new SSD and added the old datastore that is on a NAS via vSphere client, so i can see them.

but i don't see an option to "add" to inventory so i can migrate the 5.1 VMs. i'm using vSphere Client 6.0.

what tool do i need to so i can add my 5.1 VMs to my "new" ESXi 6.0 host?