Redirecting when accessing SiteWorxs CP with http://


I would like to automatically redirect http://INTERWORX_IP:2443/siteworx/ to https://INTERWORX_IP:2443/siteworx/

By default your get this html page:
<!DOCTYPE HTML PUBLIC “-//IETF//DTD HTML 2.0//EN”> <html><head> <title>400 Bad Request</title> </head><body> <h1>Bad Request</h1> <p>Your browser sent a request that this server could not understand.<br /> Reason: You’re speaking plain HTTP to an SSL-enabled server port.<br /> Instead use the HTTPS scheme to access this URL, please.<br /> <blockquote>Hint: <a href=“https://INTERWORX_IP:2443/siteworx/”><b>https://INTERWORX_IP:2443/siteworx/</b></a></blockquote></p> </body></html>

Which looks very bad.

Where is this page located? so we can modify the code to make an automatic redirection to: