'Location_ID' is the correct column name and '2' is the correct location ID so I copy/pasted just as you show it replacing the isdefault line to:
isdefault: <?php echo($row_Locations['Location_ID']==2?"true":"false")); ?>,
but I'm getting syntax errors when I paste in that line and the locations.php doesn't render at all as it did before the change. Maybe a minor punctuation issue? I did redo the map so that the label will now show the actual address - file attached- but I don't think that changes anything as I get the same syntax error when I made the change on that file I attached previously.
Please let me know. Thanks again.