How do I redirect from location http to https

MEUSITE redirect
         Proxy_set_header x-real-IP $ remote_addr;
         Proxy_set_header x-forwarded-for $ proxy_add_x_forwarded_for;
         Proxy_set_header host $ http_host;
         Proxy_pass http://1.1.1.2./meusite/;
         Proxy_read_timeout 1200;
         Proxy_connect_timeout 1200;
Proxy_send_timeout 1200;
Send_timeout 1200;