I'm curious about your architecture that would require it to have 60 syslog servers. That's a lot of capacity.
I'll pass this to our SCCM admins. The docs show how to do a silent install from the CLI, it's under Advanced Information-Automating the installation of Kiwi Syslog Server. However, this does not have any information about not installing Web Access. We only have 3 syslog servers so automation was not a priority.