After you select one of the available items in the drop down using “select item”,
when you go to the target properties - and click “Open in UI Explorer” -
go through each attributes to find the attribute pertaining to the option you have chosen under “select item” and ‘check it’.
Once checked and saved, go back to the edit selector window
use “*” to take out values not needed and include the value fetched from the excel sheet -
or something similar to that.
Hope this helps.