Figured it out. Just added the inline style below. The Left style can be adjusted for each dropdown.
<li><a href="#">ADMINISTRATION</a>
<ul class="mega-menu">
<li>
<!-- The mega drop down contents -->
<div style="width:985px; height:445px; position:relative; left:-75px; border:1px #8ab764 solid">
<div style="padding:5px 24px; position:relative;">
<p>This is a mega drop down test. Just set the "mega-menu" class to the parent UL element to inform the SmartMenus script. It can contain <strong>any HTML</strong>.</p>
<p>Just style the contents as you like (you may need to reset some SmartMenus inherited styles - e.g. for lists, links, etc.)</p>
</div>
</div>
</li>
</ul>
</li>