How to add attachments to respective cases in csm

[lucky6]

hello,

I have to move cases and attachments to Servicenow from other ticketing tool.

Here how to add attachments to respective cases through import set or API? 

Can anyone help me with the steps.

Thanks in advance..

[ersureshbe]

To identify the right ticket you should manually configure the 3rd party ticket number in ServiceNow and take this value as a unique id in the script.