'Unconnected' means 'unconnected to the main tree'. It does not mean 'no spouse/parents/siblings/children'.
You can tell when he has been connected-to-the-main-tree because he will have links to the current connection anchors at the foot of his profile.
Sandy, there are some hints and tips on the Connectors Chat page which you may find helpful.
There is an Unconnected: FAQ page to help answer questions like this.