@twilighter I assume you mean where in the park are they located, and not where in the wild in South America. The park has a loop for South American cats that starts and ends at a central junction (where the Asia and Africa loops branch off to the right and left respectively). The oncilla enclosures are at a corner where the path bends (maybe halfway through the loop). If I remember correctly (which I may not) they had four exhibits labelled - two for each species, though I only saw one northern and I believe the second was empty. One of the two southern had a mother and large kitten (and the second had a single adult - presumably the father).
@twilighter I only saw one golden cat this time. I think they had two exhibits and what was a third exhibit in previous years (the one in front) held a fishing cat this time.