how to check which Amazon OpenSearch Service Domains connected to my dynamoDB tables or vice versa

I have create Opensearch-service using @searchable of GraphQL

type Student @model @searchable {
 name: String
 dateOfBirth: AWSDate
 email: AWSEmail
 examsCompleted: Int
}

I have created the 3-4 time and now I can see 4 domains in my open search , I got bill of 30$ for this. I want to stop 3 out the 4 doamins. How can I detect which opensearch is for which appsync schema? my open search doamins are looking like amplify-opense-1dcv885ftfznp this.