Access OKCS tables in OSvC from OAC
I am brand new in Oracle Analytics Cloud (OAC). We need to access KM data stored in OKCS tables of Oracle Service Cloud (OSvC) from OAC to build the reports. In case I use Oracle Service Cloud Connector in OAC I see only some tables but not these we need to see. I got information that OKCS tables are accessible only via REST/API. I tried to find any guide how to do it but no luck.
Could somebody here advise me in some easy way how to use REST/API in OAC please? Or is available some "step-by-step" or "for dummies" guide I can use :-) ? Any hint will be appreciated.