Save data in mongo nested with kafka.connect.MongoSinkConnector

Hello
I am working with the com.mongodb.kafka.connect.MongoSinkConnector and I need to get the data from oracle that I already have in a kafka topic “WRITEOPOC” like this:
_id STICKER DESCRIP SKU CANTID TYPEO TYPEOD
|4 |2 |prueba 4 |252525 |4 |I |I |
|4 |2 |prueba 4 |404040 |5 |I |I |

I can store them like this in mongo
{
“_id”:“4”
“STICKER”:“2”,
“DESCRIPCION”:“prueba 4”,
“TYPEO”:“I”,
“Items”: [ {
“SKU”:“252525”,
“CANTIDAD”: “4”,
“TYPEOD”:“I”
},
{
“SKU”:“404040”,
“CANTIDAD”: “5”,
“TYPEOD”:“I”
},
]
}
My connector configures it like this, what should I do?
{
“name”: “MongoOC”,
“connector.class”: “com.mongodb.kafka.connect.MongoSinkConnector”,
“topics”: “WRITEOPOC”,
“connection.uri”: “mongodb://mongo1”,
“writemodel.strategy”: “com.mongodb.kafka.connect.sink.writemodel.strategy.UpdateOneBusinessKeyTimestampStrategy”,
“database”: “kafka”,
“collection”: “oc”,
“document.id.strategy”: “com.mongodb.kafka.connect.sink.processor.id.strategy.PartialValueStrategy”,
“document.id.strategy.overwrite.existing”: “true”,
“document.id.strategy.partial.value.projection.type”: “allowlist”,
“document.id.strategy.partial.value.projection.list”: “_id”,
“errors.log.include.messages”: true,
“errors.deadletterqueue.context.headers.enable”: true,
“value.converter”:“io.confluent.connect.avro.AvroConverter”,
“value.converter.schema.registry.url”:“http://schema-registry:8081”,
“key.converter”:“org.apache.kafka.connect.storage.StringConverter”

}