Change "add to cart" button in category to product description.

Hello – What I would like is simple: on a category or subcategory page (where the products appear), when I hover over the product, I would like the button to take me to the product page, rather than “add to cart.”

I have searched the forums and found other threads with this question here and here.

However, none of the options in those answers (I’ve tried them all) work. I have been adding the code to my Theme’s function.php page, through my WP dashboard, at the bottom of the page above the }
?> code. I am a newbie, so it’s possible I’m adding it in the wrong spot, to the wrong file, and/or am missing some piece of code. It is also possible that since the other threads are old, the code no longer works for the current version of WP. The other threads I’ve found are closed, so I couldn’t post directly in there.

I am using the Tower Multi-Purpose theme and the most recent update to WordPress. Any help or ideas would be appreciated.