Per rh-ee-aviana's comment in Zulip, testing revealed the following errors in the deployment instructions in the Debezium 2.7.3 Getting Started Guide:

1. URL error in KC YAML:

Example 3.1. In the Kafka Connect YAML resource, the following MySQL artifact URL returns a 404:
https://maven.repository.redhat.com/ga/io/debezium/debezium-connector-mysql/2.7.3.Final-redhat-00001/debezium-connector-mysql-2.7.3.Final-redhat-00001-plugin.zip

The following URL works:
https://maven.repository.redhat.com/ga/io/debezium/debezium-connector-mysql/2.7.3.Final-redhat-00003/debezium-connector-mysql-2.7.3.Final-redhat-00003-plugin.zip

For 3.0.8, the build number is set to 0004. This applies not only to the Getting Started guide, but also to the Installation and User guides.

2. The preceding KC YAML example also defines a bootstrap server at port 9093, a port that is normally used for TLS communication, but the example does not specify the use of certificates. Given the introductory nature of the material, it seems best to err on the side of simplicity, so we should probably remove any suggestion that TLS is involved.

The change to the Port number from 9093 to 9092 applies only to the Getting Started guide, where the use case is to provide a simplified installation in a POC environment that does not require encrypted connections. The port number remains unchanged in the User Guide and Installation guides.