It's a bit more complicated than that. You can make reservations through Disney to stay in Kidani Village, and there are also DVC villas in Jambo House.
Way back when Animal Kingdom Lodge was first built, there was one building, and it operated as a Disney resort.
Some years later, it was decided that a Disney Vacation Club property would be added to AKL. This was done in two phases. First, some existing rooms on the fifth floor were converted to studio, one and two bedroom villas. The existing AKL building was given the name Jambo House, and is now part hotel, part timeshare.
Then, Kidani Village was built, with studio, one, two and three bedroom villas. It's an all-DVC building.
So, to answer your question: where you're staying depends on what room type you booked. If you booked a studio or larger villa, you could be in either building, and you would have been asked which building you wanted at the time you made the reservation. The resort name on your reservation would be Disney's Animal Kingdom Villas - Jambo House or Disney's Animal Kingdom Villas- Kidani Village.
If your confirmation says Disney's Animal Kingdom Lodge, you're staying in Jambo House.