SA 189 then 4Z 921 at Johannesburg
Dar es Salaam → Johannesburg → Cape Town
Timetable, Johannesburg time
07:55SA 189 from Dar es Salaam at the gate
07:304Z 921 to Cape Town leaves the gate
23 h 35 apart on the timetable, overnight
4Z 921 leaves 23 h 35 after SA 189 arrives on the timetable: more than half a day, so not a connection we count.