Configure Nginx reverse proxy outbound connections to external squid proxy

I need to have nginx as reverse proxy to a website using external squid servers. Nginx should pass all the traffic (http/https) throught squid before connecting to the proxied website. A small illustration of what i need to be done: user -> ([login to view URL]) nginx (ip 1.1.1.1) -> all outbound connections -> squid proxy (ip 2.2.2.2) -> Squid IP Pool (3.3.3.3) -> proxied website ([login to view URL]) Now, let me explain a bit: The user, connects to nginx with hostname [login to view URL], which reverse proxy test.com. BUT nginx passes all the outbound requests to a squid proxy, which uses his IP Pool to connect to [login to view URL], so basically, [login to view URL] will see ONLY the Squid IP pool ip's (3.3.3.3). The squid proxy, the nginx reverse proxy ip's shall NOT be seen from [login to view URL] access log. (1.1.1.1 and 2.2.2.2 MUST remain Hidden). Squid need to be latest and compiled to work with https/http websites, Nginx must be the latest Mainline Build. The enviroment need to be ubuntu 14.04 LTS (not highter). I will need to test the configs before I pay. Thank you. Budget is $50.