As an administrator, you need to:
First set up HashiCorp Vault and create the relevant secrets, in this case, the signing keys, and store them in the vault.
Configure the connector to vault from the JFrog Platform using the REST API or JFrog Platform.
Provide the path and ID of the secrets for the relevant keys using the REST APIs or JFrog Platform to reference the signing keys from vault to the JFrog Platform.
To help you set up HashiCorp Vault to use with JFrog Artifactory, you may want to review this knowledge base article from JFrog Support.