A bulkhead connector assembly is provided having an outer housing that has an internal chamber. The outer housing has a sealing section configured to seal an exterior of the outer housing within an opening. A terminal housing is configured to hold a plurality of terminals. The terminal housing is received in the internal chamber. The terminal housing has primary locking mechanisms configured to secure the terminals in the terminal housing. An independent secondary lock (ISL) is separately provided from, and coupled to, the terminal housing. The ISL is configured to secure the terminals in the terminal housing and assure they are properly seated.