Mail merge -- Word and Outlook with Excel data source: how do you insert the e-mail addresses

Hello,

I have got an Excel spreadsheet data source with the following four headings in A1:D1:

            First            Last            Email1            Email2

First is the first name.
Last is the last name.
Email1 is the simple email address:  johndoe@abc.com.
Email2 is the display as form:  John Doe (johndoe@abc.com).

The workbook has been named and saved to a folder.

I have written the mail merge document in MS Word and gone through all the steps to insert the fields.  The only thing I can remember is how/where to insert or designate the email addresses (using column C, Email1).

Thanks