The C# example that Mark G linked is quite dated and I would expect MS to have corrected the defect in which the PreAuthenticate property was ignored. At any rate, you need to set preauthenticate=true using the correct syntax for your language.
I could not tell from your message whether the URL was intended to be the IS soap processor or not. If “WERCS” is the directive for your custom soap processor then the URL for the endpoint would be: http://host:port/soap/WERCS.
Also, a web services connector has nothing whatsoever to do with allowing external clients to consume web services provided by IS. The WSC is just a wizard that generates Flow to consume one or more web service operations hosted elsewhere.
HTH,
Mark