KL 592 then HV 6001 at Schiphol
Johannesburg → Amsterdam → Porto
Timetable, Amsterdam time
10:10KL 592 from Johannesburg at the gate
10:00HV 6001 to Porto leaves the gate
23 h 50 apart on the timetable, overnight
HV 6001 leaves 23 h 50 after KL 592 arrives on the timetable: more than half a day, so not a connection we count.