I asked the Author of wordPress plugin WP Header Images that Can he please direct me where to place the code or how as placing it in the header.php didn’t work before or after or is it mandatory to fill out all images of the menu to work?

He informed me that i have to use it undertag and if i’m having any div with the name or id as “content” so use the code inside it. He asked me put must page my website URL here so he can check it properly that what exactly  missing.