On the template at https://www.caladiumsdirect.com/default2.asp where the Garden Chair examples are, there's a button to "Buy". It's not linked. I'd like to link it to add this product to the cart, https://www.caladiumsdirect.com/proddetail.asp?prod=White_Christmas

What is the link code to do this?

Hi, I believe those are all examples, and would be removed and replaced by actual products.
I suggest you use the recommended products feature there and you can see that setup here - https://www.ecommercetemplates.com/help/home-page-display.asp#recommended
This way, you decide in the admin what products to show there and that link for the buy will work automatically without any manual coding.

Thanks,
David