Drupal 7 Custom Panel Layout

Greetings I created a custom layout in panels so that I can have cleaner html

I added a layouts folder in my theme folder, and have stripped the .tpl file to just the following

<div class="col-lg-2">
<?php print $content['left']; ?>
</div>
 
<div class="col-lg-9">
<?php print $content['right']; ?>
</div>

Is there a way to find out what sections/ fields make up the $content['right']  before it actually renders like an array or something? print_r does the same thing as print...I would like to stripout all of the panels html completely and only show my own. Let me know thanks