joli_toc_slide_out_box_bottom

Prerequisite: you must switch on the Bottom box option (under Slide-out TOC > Slide-out custom content boxes)

Add custom content at the bottom of the slide-out panel.

The container’s selector of the custom content is .wpj-jtoc--slide-out-custom-box-bottom

add_action( 'joli_toc_slide_out_box_bottom', function (){
    echo do_shortcode('[my-shortcode]);
});