So those numbers would be for finding the Squad BCT Server in Squad.
Within Squad, you go to Custom Browser and simply search for 29th Infantry Division [BCT Server] and the server should appear. Make sure that in your filters you also have checked Show Empty Servers as well as Show Modded Servers*
The details on how you connect to TeamSpeak are in the Recruit Handbook, section 2.4. But your Enlistment Liaison, PFC Pritchard (@emyrpritch) will take you through all the necessary steps regarding connecting to the TS and, if needed, Squad BCT server.
If you have any other question, let me know and more than happy to help!
EDIT*