Enable https on Pentaho BA Server using nginx Reverse Proxy

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I am trying to enable https for the Pentaho BA Server using nginx reverse proxy. 
I have posted the tomcat and nginx configurations in below.

I am able to access the Pentaho BA server login page https://test.mydomain.org/pentaho-test/Login

But when i tried to login with right credentials, I am getting the Mixed content error(http & https) in browser. 
Please help to handle this 

Browser Error:
Mixed Content: The page at 'https://test.mydomain.org/pentaho-test/Login' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://test.mydomain.org/pentaho-test/Home?locale=en_US'. This request has been blocked; the content must be served over HTTPS.

nginx-configuration

upstream test_pentaho_servers {
    server testmydomain.com:18080 fail_timeout=0;
}

server {
    listen 80; 
    listen [::]:80;
    server_name test.mydomain.org;

    rewrite ^ https://test.mydomain.org$request_uri? permanent;
}

server {
    listen 443 default_server;
    listen [::]:443 ipv6only=on default_server;
    client_max_body_size 4G;
    server_name test.mydomain.org;

    access_log /var/log/nginx/sites/test.mydomain.org/access.log;
    error_log /var/log/nginx/sites/test.mydomain.org/error.log;

    # see https://wiki.mozilla.org/Security/Server_Side_TLS
    ssl_certificate ssl/test.mydomain.org.crt;
    ssl_certificate_key ssl/test.mydomain.org.key;
    include ssl-parameters;

    location /pentaho-test {
        proxy_pass http://test_pentaho_servers/pentaho-test;
    }

    location /pentaho-style {
        proxy_pass http://test_pentaho_servers/pentaho-style;
    }

    error_page 500 502 503 504 /500.html;
}

tomcat-conf-server.xml

    <Connector URIEncoding="UTF-8"
               port="18080"
               protocol="HTTP/1.1" 
               connectionTimeout="600000" 
               proxyName="test.mydomain.org"
               proxyPort="443"
               schema="https"
               secure="true"
               redirectPort="443"
    />

tomcat-webapps-pentaho-test-WEB-INF-web.xml

  <context-param>
    <param-name>fully-qualified-server-url</param-name>
    <param-value>https://test.mydomain.org/pentaho-test/</param-value>
  </context-param>

Hello!
This solved the problem for me:
https://wiki.bizcubed.com.au/xwiki/bin/view/Pentaho+Tutorial/NGiNX+Reverse+SSL+Proxy+for+Pentaho

in this example, 8008 is the default port for http requests, 80 is port where nginx reverse the traffic.

Sorry for bad english, I hope that helps.

    <Connector URIEncoding="UTF-8" port="8008" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <!-- rviggiani aggiunta conf per reverse ssl-->
    <Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8008"
               proxyName="bi.example.it"
               proxyPort="443"
               scheme="https"
     />

Your solution works like a charm @robyviggy ! Thanks a lot, I've been struggling with this all day.

Greetings, Only one question. The file of pentaho-server is only zip ? Because I try but the system said: Cuation, It is initializing, please not shut down or restart. If you can help me. Thank you.