Can't connect to S3 target endpoint

For anyone having problems connecting to an S3 bucket using DMS, read this: https://aws.amazon.com/pt/premiumsupport/knowledge-center/dms-connection-test-fail-s3/ . My problem, tho, was that for some reason I thougth I had to use the full ARN on the "bucket name" field, but you just have to write it's name.

Edited: Solved it.