WooCommerce popup when adding product to cart?

Question

HTML

Hello..

When adding a product to the cart, when you are on the page of this product, a window appears (see screenshot).
The site has a YITH WOOCOMMERCE ADDED TO CART POPUP plugin, you might think that it adds such a window, but no. It only adds a window in the catalog where the list of products is, and not on the product page itself (this is clear from the settings, from the plugin description).

What I need to do: The window that pops up with the help of the plugin should also be done when adding a product in the card itself.
What is the problem: I went into the plugins folder via FTP and using the search I got all the PHP and JS files from there (opened them in sublime text 3). After that, using the search for the contents of this file, I tried to search for modal-content, modal-body, "Added to cart!" and modal_bg.jpg (this is the background of the window on the product page). Result - nothing found. I also unloaded the database and did a search on it, again, nothing. I don't understand where it could be.

As for the files in the folder with the theme itself, I also opened everything related to the WooCommerce plugin and not only, nothing was found either.

I also tried to search for these words throughout the site, using the Total Commander search, I did not find anything.

Screenshot of the popup in the product card (what I can't find).

Screenshot of the popup in the catalog of all products (I want to replace it with this).