Many SOA developers still stay in the tools supporting Web services. In terms of testing, they rely on some popular open source products, such as SoapUI, JUnit, and TESTMAKER, which were developed for testing Web services. The tools could work well also on SOA, if they test an orchestration of services involved in connections between Business Services and Application Services. This paper first analyzes what the connection is in SOA, and then it proposes what should be included in their test steps to test the connections according to the definition of the connection of services with supporting SOA principles. For the developers who still use the Web service testing tools, this paper contributes on providing the test step supporting the SOA connection testing, which is analyzed to be one of the most important factors for successful SOA products.