I don't think you can the link will always open the template.
You can do this by making the "LINK" run code (Insert > Action > Run Code
The code would look like this
Code:
Sub wordOpen()
Dim oWdApp As Object
On Error Resume Next
Set oWdApp = GetObject(Class:="Word.Application")
If oWdApp Is Nothing Then _
Set oWdApp = CreateObject(Class:="Word.Application")
oWdApp.Visible = True
'change the path!!
oWdApp.Documents.Add Template:="C:\Users\John\Desktop\whT.dotx"
End Sub