Send or retrive audit logs to SIEM

Hello all,
we are using Vault on HCP (I must say we are absolutely new in the plattform, specially in cloud environment), and we’d like to send (or retrieve) audit logs to a SIEM. We saw that logs to Splunk, Datadog and Grafana are supported out of the box. Does anyone know what should be the best way to gave logs in an Elastic SIEM?
Thanks in advance

Best regards.