SA 306 then 4Z 176 at Johannesburg
Cape Town → Johannesburg → Gaborone
Timetable, Johannesburg time
09:00SA 306 from Cape Town at the gate
07:254Z 176 to Gaborone leaves the gate
22 h 25 apart on the timetable, overnight
4Z 176 leaves 22 h 25 after SA 306 arrives on the timetable: more than half a day, so not a connection we count.