How do I find the parent URL on a WordPress page?

I am working on a website for a company right now and I am running into this issue:

The original URL is similar to this: mysite.com/industrial/ where industrial has 4 subcategories which each have 2-6 pages within them. I changed the original URL to mysite.com/products/ but the subcategories and pages within are not changing to include products in their URL – they still use industrial.

For ex.: mysite.com/industrial/abc/ should be mysite.com/products/abc/ but it stays as mysite.com/industrial/abc/ after I made my change.

I assume that the subcategories are in a folder called industrial (I did not create this website so I do not know), however I can’t find that folder anywhere and I’m not sure where to look. I have tried to go in to each of the subcategories and change their URLs, but I can only edit the abc part of the URL and I can’t touch the rest.

** This was all done on WordPress with a custom theme created by another company. Thank you in advance for any help you can offer!

EDIT: For anyone who is also struggling this problem this is how I solved it:

• Go to Plugins -> Plugin Editor
• At the top there was an option called "Select plugin to edit" -> chose the one that is custom to your website
• I found the information that was suggested by Phil in the comment section on this website
• I updated the names of my fields in the rewrite permastruct section for register_post_type as well as register_taxonomy
• Update the page and flush your permalinks and you should be good to go!