Haraka email delivery server

Hi, Project: set up delivery server on MailWizz and configure Haraka so that MailWizz (on one VPS) can send emails to Haraka (on another VPS) and Haraka can then send out those emails to subscribers. More information: Haraka runs on node.js. Haraka wants secure connection between MailWizz and Haraka (SSL, port 465). The MailWizz VPS has Plesk control panel with Let's Encrypt set up for the VPS mail servers. The Haraka VPS does not have a control panel. There are other programs on the Haraka VPS (WordPress, Postal MTA) as well as Haraka. This is not a simple connection of MailWizz to an everyday email server. I have successfully connected MailWizz to Postal MTA and other email service providers including SparkPost and Mailgun. I am struggling with Haraka. This project seems to me to require a knowledge of Let's Encrypt SSL certificates as well as understanding of how Haraka is put together, based on Node.js, and its various plugins (see: [login to view URL]). Would you be able to set up delivery server on MailWizz and configure Haraka so that MailWizz (on one VPS) can send emails to Haraka (on another VPS) and Haraka can then send out those emails to subscribers? Best, Bob