Ok Paolo,
my understanding and usage is as follows with the sylink tool.
Assume your SEPM crashed or one of your groups in the SEPM has been deleted accidentally. In that case when you reinstall new SEPM clients won’t show in the console or in the newly created group. So using this tool we can tell those clients where exactly then need to look and register themselves. We can do this with given Symantec tools but we have to do it one by one for each client but this tool will automate that task. Huge time saver.
I have created screen cast for those activities from the beginning to completion stages, but uploading is a problem for me. If Symantec agree to freely distribute my screen cast I can give it to them. (Of course they have to provide me the shipping cost for me to send them :P )