SA 306 then 4Z 174 at Johannesburg
Cape Town → Johannesburg → Gaborone
Timetable, Johannesburg time
09:00SA 306 from Cape Town at the gate
08:454Z 174 to Gaborone leaves the gate
23 h 45 apart on the timetable, overnight
4Z 174 leaves 23 h 45 after SA 306 arrives on the timetable: more than half a day, so not a connection we count.