put https://yourServer.jamfcloud.com/JSSResource/gsxconnection
<gsx_connection>
    <enabled>false</enabled>
    <username/>
    <account_number/>
    <uri>https://partner-connect.apple.com/gsx/api</uri>
</gsx_connection><gsx_connection>
    <enabled>false</enabled>
    <username/>
    <account_number/>
    <uri>https://partner-connect.apple.com/gsx/api</uri>
</gsx_connection>