You are right: http://localhost:8040/services lists the service endpoints active in your Talend Runtime, assuming you have one running onyour local machnine. You may also use the command "cxf:list-endpoints" within the console of your runtime to list the available endpoints. If you don't see any services I suppose deployment of your service failed for some reason. BTW, the Tomcat Manager will not help you as Talend Runtime is based on Karaf not on Tomcat.
Regards,
Zsolt