Nginx - SSL Proxy configuration

For a project at work I had to setup a SSL Proxy with nginx, because one of our old weblogic server can’t manage SHA2 certificates and we can’t update now. We decided to make it talk to a SSL Proxy and here is the code of the nginx.conf acting as such. It makes use of Nginx module http_proxy. As a little reminder we had a situation like this : serverA (client certificate) -> webservice (HTTPS / server certificate)