In a page--front.tpl.php i am trying to display a panel.
This works well with:

<?php if ($content = render($page['content'])): ?>
<?php print render($page['content']); ?>
<?php endif; ?>

Now i like to specify which of the content (which display) to render in my tpl.php override.
Something like:
<?php print render($page['content']['my_section']); ?>

But how to get 'my section'?

I did a dsm and got the following:
content key system_main is Array
content key #sorted is 1
content key #theme_wrappers
Array- content key #region is content

However dont know how to use this info.

Help appreciated
Thanks