Position inside page wrapper, not browser window

Hi! I’m trying to get the plugin to align to the right side of my page wrapper instead of the browser window so that it aligns with the right side of my web design. I see that the PHP is rendering it at the beginning of the document but I’d like it to render inside my wrapper div element. How can I accomplish this? Is there anyway the developers could add a CSS class/id feature to render the plugin wherever you want in the page? This would make this plugin infinitely useful to me. Thanks!

https://www.ads-software.com/extend/plugins/wordpress-sliding-drawer-content-area/