Unable to connect local Kafka Connect to Confluent Cloud

I'm trying to connect my local Debezium Kafka Connect to Confluent Cloud but it fails to stream CDC. However, it successfully produces messages to offset and status topics.
When creating a SqlServerConnector, it logs
```
WARN [Producer clientId=connector-producer-cdctesting-connector-0] Bootstrap broker pkc-l6wr6.europe-west2.gcp.confluent.cloud:9092 (id: -1 rack: null) disconnected (org.apache.kafka.clients.NetworkClient)
```

I'm setting producer and consumer settings in the API request
```
"reporter.admin.bootstrap.servers":"",
"reporter.admin.sasl.jaas.config":
"org.apache.kafka.common.security.plain.PlainLoginModule
required username=\"\" password=\"\";",
"reporter.admin.security.protocol":"SASL_SSL",
"reporter.admin.sasl.mechanism":"PLAIN",
"reporter.producer.bootstrap.servers":"",
"reporter.producer.sasl.jaas.config":
"org.apache.kafka.common.security.plain.PlainLoginModule
required username=\"\" password=\"\";",
"reporter.producer.security.protocol":"SASL_SSL",
"reporter.producer.sasl.mechanism":"PLAIN"
```

Any ideas what is wrong here?