I will try to be more clear...
-The feature you want is not supported by PHPExcel, as far as I know.
-I've looked quickly where this information could be entered in an Excel 2007 file.
Some tests are needed to check my analysis.
-I looked at how PHPExcel registered information about these items.
-In the case that interests you, PHPExcel inferred information without user intervention as possible.
Add this feature seems not insurmountable, but applying to amend PHPExcel:
-Adding a property in class Worksheet (or Worksheet_SheetView) to store the coordinates of the desired cell.
-(Optional but cleaner) add in the Worksheet (or Worksheet_SheetView) class methods to set and retrieve the aforementioned property.
-Change the _writeSheetViews method of the class Writer_Excel2007_Worksheet so it integrates the management of this property.
I don't have an example to give you, the code is to write.