How to secure consule access from Vault

I’ve installed Vault with Consul backend on AWS EKS by using Helm. The default installation doesn’t include any steps to secure Consul access. It’s not a good way. I need to secure Consul access from Vault.

I think there are some ways but the procedure doesn’t describe how to apply json entries to an installed Vault&Consul in Kubernetes.

Could you please advise?

Thanks & Reagrds