Documentation of QAComplete Control to TestExecute

Our team is using QAComplete in cloud to control the local TestExecute run to perform testing. The issue is that there is no documentation about the connection process. Due to the computer system issue, the QAComplete sometimes cannot receive the final status from TestExecute causing many issues. So we would like to understand more about how QAComplete receive the status report from TestExecute, or any documentation for the connection between QAComplete and TestExecute. Thanks!