it does mention this in step 5:
street address for the marker location you wish the link to focus on.
Example: If the location I wanted my map to focus on was 8899
University Center Ln, this text would look as follows.
<a href="#" onClick="wagmp_map_1_obj.getPointByAddress
('8899 University Center Ln').marker.openInfoWindowHtml
(wagmp_map_1_obj.getPointByAddress('8899 University Center
Ln').address.infowindowtext);">8899 University Center Ln
even the example only shows the street address.