HA Config steps - Unclear

When configuring HA, per this article, https://www.manageengine.com/products/passwordmanagerpro/help/high-availability-pgsql.html:

Stop Primary Server, if running
Open a command prompt and navigate to <PMP_Primary_Installation_Folder>/bin directory
Copy the secondary server certificate and paste it under <PMP_Primary_Installation_Folder>/bin directory
From <PMP_Primary_Installation_Folder>/bin directory, execute the following command:

importCert.bat <name of the server certificate>

This adds the certificate to the PMP certificate store.

Where is the "secondary server certificate" and what is the file name I should be looking for? I looked on the secondary server and see no .cer file that references the secondary server. I do find under .\PMP\conf\saml, .PMP\agent & .PMP\conf .cer files that reference the primary server. I am assuming these came from the HA zip package I extracted in the earlier steps.

Thanks for the assistance.

--Jeff