You don't need any additional configuration in-order to enable SSL to the TEWS urls. Follow the below pattern to access the IDM TEWS url:
IDM Admin application url - https://<LB url or Hostname:port>/iam/im/<IME_NAME>/ui7/index.jsp
TEWS Url - https://<LB url or Hostname:port>/iam/im/TEWS6/<IME_NAME>?wsdl