Google Developer Console - how to edit app usage instructions after release is created?

When creating a new app release on Google Play, you are asked to give instructions on how to use the app if necessary. I am working on an app that requires login. So I entered the information on how to acquire login credentials, and moved on. Only after I was done I realized that I could simplify this a lot by just providing test credentials for the reviewers.

Is there any way to edit these instructions again? I can't seem to find them anywhere...

Using the new Play console design by the way (but can still switch to the old one if necessary)

I've found out myself. It looks like the new Play console has a bug here, so I believe this information could be helpful for others. What you want to do is:

1. Go to Publishing Overview
2. Scroll down to the App Content section. App access instructions are not available here.
3. Click on any item in the section
4. Go back
5. You end up on a different screen which shows you a detailed overview of the app content
6. Here you will find that you can select App access where the instructions can be changed.