How to find the list of opprtunity records shared via sharing button (excluding account team sharing)?

We have account team implemenation and Opportunity Share records are created with rowcasue as Manual as rowcause can;t be defined for standard opportunity object . We also have sharing button enabled and opprtunitity records are shared via sharing button as well .

Now how will I retrieve list of users / public groups / roles for whom opportunity records are shared via sharing button only ?
Please note that, row cause is manual for account team sharing as well .