Show Form On Event Calendar Plugin’s Single Event Page Only

I’m attempting to show a Contact Form 7 form using a shortcode with Modern Tribe’s Event Calendar on their single event page only. I’ve tried using the following, but none are working.

And then I tried this. Custom Post Type. Although Event Calendar is a CPT I’m not sure their parent page is and or the children beneath the parent.

Neither works. And I’m not 100% sure on the Custom_Post_Type one. I did change the default page name from Events to Custom Events for calendar page and Custom-Event for single event page. So the url is

I need the form to only show on any sub page of custom-event. Not sure how to go about this. Thanks.