Adding the following to your ASCX file should do the trick:

    <script runat="server">
        Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
            Dim attr As New CustomAttribute 
            attr.Name = "IncludeNodes" 
            attr.Value = "HOME.CONTACTS" 
            dnnNAV.CustomAttributes.Add(attr) 
        End Sub
    </script>

Mark Allan (@MarkXA)
DNN Garden, home of the DDRMenu free DotNetNuke menu module