AWS and Bubble's API Connector

First off I’d like to say I’m not great with code, sorry, but I’ll try my best to understand your answers.

I made a webapp on bubble and now the owner wants to integrate data from a Amazon S3 Cloud. I could get to the bucket and then to files (which are all images organized in folders named after their dates, all inside the bucket’s root) using the software Cyberduck and the Amazon S3 authentication, inputing my Access Key ID and Secret Access Key.

However, I don’t understand how do I GET this data through an API Call from the API Connector. This is my setup so far.

My only experience with API connections was this YouTube call I made for the app’s video page and I followed a pretty straightforward tutorial. Amazon on the other hand have tons of services and I read some extensive documentation about REST APIs, but I still don’t understand how that applies here.

If someone can point me to the right direction, I’d be very happy and thankful. The Amazon S3 Cloud owner uses it for another app and have very strange schedule, so it’s hard to contact him and get a reply imediatly, but any other information needed from him I can ask and update this thread.

Again, thank you in advance for any help.

I did found out the address for these links are public and stored in the following manner: