You would have to set up RTC as a "build provider":

http://publib.boulder.ibm.com/infocenter/clmhelp/v3r0m1/topic/com.ibm.rational.test.qm.doc/topics/t_config_rtc_build_integration.html?resultof=%22%62%75%69%6c%64%22%20%22%70%72%6f%76%69%64%65%72%22%20%22%70%72%6f%76%69%64%22%20

Now you can also create Test Execution Schedules to kick off tests (Build verificaiton tests) that will be automatically associated with the build.