If ATClone does not appear in your product page, under the description, you will have to do a little manipulation which takes 2 min.
Go to Edit code of your theme:

Now look in Sections or Templates: product-template.liquid.

If product-template.liquid is not present, look for product-form.liquid.
Then look for {{ product.description }}.
And copy / paste this line of code just below:
{% include 'second-button-cart'%}

Remember to save.
Go to Edit code of your theme:

Now look in Sections or Templates: product-template.liquid.

If product-template.liquid is not present, look for product-form.liquid.
Then look for {{ product.description }}.
And copy / paste this line of code just below:
{% include 'second-button-cart'%}

Remember to save.
Published on: 24 / 03 / 2019