Which tables store Contract approval history

There is a user requirement to get all Contracts approved by a specific user.
I'm asking for guidance to know which tables store approval history.

Path: Contract Management> Contracts> History (Tab)> Approval History (Section).
Here there is a history with all approvers related to the Contract. 
I need your help to identify which tables store this history, then I'll be able to find the user name and then the contracts related to this user.