Cassandra sink connector : how to add whole topic JSON in one col.

Question

I am using Cassandra Sink Connector with Kafka, now i want to insert whole topic JSON as it is into single Cassandra table column instead of creating diff cols. so what should be the connector KCQL expression ?

INSERT INTO connector_json_table SELECT * FROM test-nk-29-dec

Topic name : test-nk-29-dec
Cassandra Table name with only one column - connector_json_table


connector_json_table contains only one single column with "Text type", Now i want to insert complete JSON into this col.