Fishbait, MRU and SEZ are considered one stopover, JNB will be considered one, and you have one more. So you can stop in NBO anyway. Assuming you have two segments, you can actually go to several places like Lusaka, Harare, Mombasa, Djibouti, Llongwe. Sorry if I misspelled any. You just can't connect through South Africa (so cuts out places like Windhoek and Victoria Falls), or through Joburg within South Africa (so Durban, Capetown, etc are excluded).