From what I understand, you should be able to connect to all six of them by setting them up in CGRemote using their individual IP addresses along with 4028 as the port.
Yes you can, no problem. I have eight S1's all being monitored by CGRemote, all on port 4028. The how-to I wrote for my community members can be found here -
https://www.hardfought.org/phpBB3/viewtopic.php?f=25&t=7780