Как haproxy настроить на проксирование из http в сторонний https?

global
    log         stdout format raw local0

defaults
    mode    http
    log     global
    option  httplog
    option  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

frontend http_front
    bind *:80
    default_backend http_back
    http-request capture req.hdr(Host) len 64
    http-request capture req.hdr(Referer) len 64
    http-request capture req.hdr(Content-Lenght) len 64
    http-request capture req.hdr(User-Agent) len 64
    http-request set-header X-Forwarded-Proto https if { ssl_fc }
    http-request set-header X-Forwarded-Proto http if !{ ssl_fc }
    #http-request redirect scheme https unless { ssl_fc }

backend http_back
    balance roundrobin
    server https BUCKET.hb.bizmrg.com:443 check

400 Bad Request
The plain HTTP request was sent to HTTPS port