I don't think it is possible. If your using a range in an Excel file, then the data output needs to match that range. If you have to fit into your Excel template something which does not fit into that template...
All I can suggest is you update your Excel template's range to be big enough to handle any now or future additional areas, or find some other way to process the data as it comes in. One way is to dump SAS data out to an Excel file, and then have your template file run some VBA code to pull that data into itself.
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