If you just want to replicate a website, you need to create a JMS template rule.
See for example the "replicMaster" rule described plenty of times in the forum
You also have the tutorial video 0.d that show the "replicMaster" rule that you have to write to replicate the master website.
www.jms2win.com/en/tutorial#jms12x-0d
Here it is again a sample JMS Template rule:
Template ID = replicMaster
domain = {site_url}/multisites/{site_id}
Template site = <master DB>
New prefix = {site_id}_
Deploy folder = {site_dir}
Once the rule is created, you can use it to build the slave site.
Site ID = test1
Template = select the "replicMaster"
Site title = put a new title.