Arriving in Johannesburg: 1941–1943 edit

Under the heading 1941 to 1943 Someone has written

To continue his higher education, Mandela signed up to a University of South Africa correspondence course, working on his bachelor's degree at night.[45].

However Unisa states on its website that it only started correspondence courses in 1946 REF: unisa.ac.za/sites/sbl/default/About/History

I was a student at UNISA while Mandela was studying at UNISA in the 70s. My lecturer told me he was a class mate. When did he start at UNISA. It is important to get the dates right.