No, Zone 1 doesn't have a system connect tone either. If there's something in that field, then it's a mistake.
Zones 1, 2, 3 and 4 all work the same way. Each site has a connect tone and there is no system wide connect tone.
If a site doesn't have a connect tone listed, it's because nobody has submitted it. Since connect tones have no relevance to scanning, it's not really a problem.