hook into Image Hover Effects for Visual Composer

Hi,

Is there a hook I can use to hook into Image Hover Effects for Visual Composer? I want to add some text under the title and description in the number 15 flip box transition. I can add code to the image-hover-effects-for-visual-composer/render/hover.php file but I want to hook into it using my functions.php file or by making a plugin.

If you go to the above page you’ll see the text “Book Now” inside the flip box transition. I want to use a hook to add that text.

Thanks

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