How to specify the plugin version in Kafka Connect?

Question

I have 2 different versions of the same plugin in the worker properties (plugin.path option).

GET /connector-plugins
    {
        "class": "io.debezium.connector.postgresql.PostgresConnector",
        "type": "source",
        "version": "1.9.6.Final"
    },
    {
        "class": "io.debezium.connector.postgresql.PostgresConnector",
        "type": "source",
        "version": "2.5.1.Final"
    },

How to use a plugin version in connector.class connector options that are located on the same worker?

    "name": "some-connector",
    "config": {
        "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
     ...

If I leave this option without a version, the old connector gets an error:

    "old-connector": {
        "status": {
            "name": "old-connector",
            "connector": {
                "state": "RUNNING",
                "worker_id": "1.2.3.4:8083"
            },
            "tasks": [
                {
                    "id": 0,
                    "state": "FAILED",
                    "worker_id": "1.2.3.4:8083",
                    "trace": "org.apache.kafka.connect.errors.ConnectException: Error configuring an instance of PostgresConnectorTask; check the logs for details\n\tat io.debezium.connector.common.BaseSourceTask.start(BaseSourceTask.java:131)\n\tat org.apache.kafka.connect.runtime.WorkerSourceTask.initializeAndStart(WorkerSourceTask.java:226)\n\tat org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:186)\n\tat org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:243)\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\n"
                }
            ],
            "type": "source"
        }
    },

I need to configure the connector for the new version of the plugin so that the connector with the old version of the plugin remains working (both should work) in the one worker.