With a savanna view you will be on Kudu or Zebra trail on the 5th floor. I’ve stayed on and like both hallways and have had villas facing each of the 3 savannas visible from Jambo House villas. For a first visit Zebra trail w/ Arusha savanna view would be a good request. Zebra trail is very convenient to the pool & the Mara (quick service restaurant) and Arusha savanna is the central savanna. You can ask the owner you rented the points from to have any request noted.
Realize that the animals move around on the savannas and there will be times when you see none and other times when you’ll see several irrespective of where your villa is. The 3 savannas visible from Jambo all have giraffes and usually at least a pair of zebras, as well as many other species. The largest, Sunset savanna, which is visible from Kudu trail, has several zebras. Uzima savanna, which is visible from Zebra trail, is most likely to have baby giraffes if there are any.