Setup HAProxy to read data from https public IP

Job ID: 32030245

Budget: $10 – $30 USD

I need to setup the HaProxy to read data from "https public IP".
Problem is the HaProxy is getting the 503 Error when calling the public HTTPS IP.
OpenSSL already setup for the IP can data can be seen with the https://myip:myport
Note: I have to user mode HTTP to pass the header info because i need to identify the user IP address.
I'm using Centos 8. Please see the network from flow chart.
Related categories: System Admin Linux UNIX Ubuntu Debian