4Z 756 then SA 359 at Johannesburg
Mthatha → Johannesburg → Cape Town
Timetable, Johannesburg time
19:004Z 756 from Mthatha at the gate
17:30SA 359 to Cape Town leaves the gate
22 h 30 apart on the timetable, overnight
SA 359 leaves 22 h 30 after 4Z 756 arrives on the timetable: more than half a day, so not a connection we count.