It is a classic closed-list ballot: no candidates’ names included.* Just the photo of the no. 1 candidate–the one who will become “President” if the party wins the majority or leads a coalition.
In a separate post, Steven discusses the patterns of national and provincial lists.
Regarding the no. 1 candidate on each national list: he or she is technically the party’s “presidential candidate.” Yet another of those subtleties usually missing from the media coverage is that the successful candidate, while having the title of President, is really a prime minister: the election is not direct (because becoming President depends on the outcome of the parliamentary election), and the occupant of the post is subject to removal by a majority in a no-confidence vote.
Of course, one party is going to get an overwhelming majority once again, and the leadership will have chosen the individual legislators–due to the closed list.
It is also worth noting that the President/prime minister is also head of state, which is rather unusual for a parliamentary system. The occupant of the office is also limited in tenure, which is also unusual. So the roles of head of government and state are fused, but South Africa is without qualification a parliamentary system.
* Elsewhere, some closed-list ballots do list some (or, if the district is small, all) of the candidates and not just the leader. But given that such ballots allow no candidate voting, there is no “mechanical” need to show candidates. That’s what I mean by “classic” closed list: just the parties (and their candidate for national executive). (I suppose one could say it would even more classic if even the no. 1 candidate were not shown. I am not aware of such a ballot, but perhaps one has existed somewhere.)