I saw that most of the kits will have that GM column connector. The Aussie car has a square looking connection so I will probably just wire both sides to match the GM connection. Probably going to go with the 14 circuit Kwikwire - USA made kit with some good features.
Planning it for the winter project.

https://kwikwire.com/collections/complete-wiring-kits/products/14-circuit-wire-harness