How to export hosts (Bulk) from free edition to enterprise edition

What I’m trying to achieve is we need the current server running and move the configuration to a new server .once we make sure everything is working (over 300 instances) then switch over to the new server. I check the configuration path ~/etc/check_mk/conf.d/wato/ not found but I have in opt/omd/sites/mysites/ is that what you mean I need to export? Just to clarify.

Thanks alot