SA 562 then 4Z 815 at Johannesburg
Durban → Johannesburg → Potgietersrus
Timetable, Johannesburg time
16:30SA 562 from Durban at the gate
16:204Z 815 to Potgietersrus leaves the gate
23 h 50 apart on the timetable, overnight
4Z 815 leaves 23 h 50 after SA 562 arrives on the timetable: more than half a day, so not a connection we count.