To be honest, it's hard to say since the scenario you describe hasn't been tested. It is possible to transfer a call list from SAP CRM to Sinch Contact Center using OII but the dialing mode needs to be changed manually in System Configurator. It may also be possible that a predictive campaign call in Communication Panel would also alert via OII in CRM. But since this is an untested use case it's not possible to say which number OII would show for the call and whether the call could be answered.
Kind regards,
Nina