Understanding secret name and certificates location in Ingress gateway

Hi, I am new to Istio. As part of a POC to use TLS certificates in the ingress gateway, I created a secret with name “tls-test” and used that secret in credentialName field in gateway. Just trying to understand, what is the exact location and which container where the corresponding certificates are injected. Is there any way, I can validate that my certificates are present at this location and being used correctly?