is this code where i can add my header banner?

please see bold code from header.php. is that where i add the script for my banner adsense (which displays as green box right now as you can see at https://www.energyanalysis.org)? i can’t find anywhere to put it in the site admin as a widget or anywhere else in settings, etc. so guess i need to drop script somewhere in code..

<div id=”header”>

<div class=”headerleft”>
<h1>/”><?php bloginfo(‘name’); ?></h1>
<?php bloginfo(‘description’); ?>
</div>

<div class=”headerright”>
<p>“><img style=”vertical-align:middle” src=”<?php bloginfo(‘template_url’); ?>/images/rss.gif” alt=”Subscribe to <?php bloginfo(‘name’); ?>” />“>RSS Feed“><img style=”vertical-align:middle;margin-left:10px;” src=”<?php bloginfo(‘template_url’); ?>/images/rss.gif” alt=”Subscribe to <?php bloginfo(‘name’); ?>” />“>Comments</p>
<img src=”<?php bloginfo(‘template_url’); ?>/images/468×60.gif” alt=”Featured Ad” />
</div>

</div>