Where can I find the codes to add a Rep Dropdown on my cart page?

I purchased Sales team app and to add a Rep Dropdown on cart page this is what they are asking me to do mentioned below:

Under the snippet that is no cart-template.liquid or cart.liquid. Where can I find the codes to add it?

Thanks!

Gilles


Rep Dropdown On Cart Page

To enable Rep Dropdown On Cart Page, Copy the following code snippet into cart-template.liquid file . To edit cart-template.liquid file navigate to Online Store → Themes → Edit Code and open cart-template.liquid file. Search for cart__buttons-container and add code snippet just above cart__buttons-container.

For help contact support, they will do this for you.

{% include’AddingRepToCartPage’ %}