5Z 511 then 4Z 180 at Johannesburg
Kimberley → Johannesburg → Gaborone
Timetable, Johannesburg time
16:555Z 511 from Kimberley at the gate
15:254Z 180 to Gaborone leaves the gate
22 h 30 apart on the timetable, overnight
4Z 180 leaves 22 h 30 after 5Z 511 arrives on the timetable: more than half a day, so not a connection we count.