According to (The National Institute of Health Library of Medicine)[https://pmc.ncbi.nlm.nih.gov/articles/PMC3234451/] you are possibly correct. It most likely jumped to people from hunting bush meat, but it's possible it could also have made the jump to people in a livestock setting where someone was raising monkeys for sale as pets or lab animals. Getting bit by an infected animal could be enough to transmit the virus.
How humans acquired the ape precursors of HIV-1 groups M, N, O, and P is not known; however, based on the biology of these viruses, transmission must have occurred through cutaneous or mucous membrane exposure to infected ape blood and/or body fluids. Such exposures occur most commonly in the context of bushmeat hunting (Peeters et al. 2002).
Illegally, plugged in a server. Don't forget the 'illegally'.