put https://yourServer.jamfcloud.com/JSSResource/netbootservers/name/
<netboot_server>
<name>NY Netboot</name>
<ip_address>10.10.1.2</ip_address>
<default_image>true</default_image>
<specific_image>false</specific_image>
<target_platform>PowerPC</target_platform>
</netboot_server>