They are in
webwork2/htdocs/themes/name (i think math4 is still the standard).
In system.template look for
<!--#if can="info"-->
<div id="info-panel-right" class="span4 info-box">
<!-- styles could be different for different pages so they are not set here -->
<!--#info-->
</div>
<!--#endif-->
and move this part to where you want it