How to use the ScriptScoreQueryBuilder with KNN?

I am trying to use the script scoring function with a KNN vector field from Java/Spring. Below is the code that I am trying with, but its not returning text related to the vector I am passing. Could you please let me know if there is anything wrong with the way I am forming the query below?

	Map params = new HashMap();
	params.put("field", "nested.textVector");
	params.put("query_value", queryVector);
	params.put("space_type", "cosinesimil");
	Script script = new Script(ScriptType.INLINE, "knn", "knn_score", params);

	ScriptScoreQueryBuilder scriptScoreQueryBuilder = QueryBuilders.scriptScoreQuery(boolQueryBuilder, script);

I could not find any samples/documents for KNN scoring using Java API. Also could anyone please point me to any samples specific to KNN Java API? - Thanks

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
opensearch: 2.7.0
‘opensearch-java’, version: ‘2.6.0’

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