Where FOM stores the cpq instance id?

Hi all

we have integrated CPQ with FOM. When we create a Sales Order in CPQ, each line has its Instance ID (ex. abo_727cf4c8-fbbc-4106-9876-2fd2829c7224).

Do you know if and in which table does FOM/SCM store the CPQ "Instance ID"?

many thanks, Luca