How to set up SSL/TLS for web application?

I have built an Ensemble SOAP service (EnsLib.SoapService.Service) as a business service which accepts soap requests from another application. To secure the traffic between the SOAP service and the application i'd like to enable SSL. I see that in the management portal I can upload the certificates, chains and keys and save them as an SSL / TLS configuration. However, it is not clear to me how I apply this SSL / TLS configurtion to the soap service I am running. I would expect something under Security -> Applications -> Web Applications or even on the business service running in production itself, but I can't find it.

How do I setup the SSL connection?