In principle, containers can be offloaded at any port - Brisbane, Sydney, Melbourne, Adelaide, Perth.
In practice, once offloaded Tesla then needs to check the vehicles over and get them ready for delivery. That's easiest in a centralised warehouse (or similar) - and they're not delivering enough volume, even with the Model 3, to justify having one of those in every Australian city with a port. I could see them opening up such a centre in Perth, given the geographical remoteness of WA from the east coast, but pretty much everywhere else would be sourced from somewhere on the east coast. Which almost certainly means Sydney.
It's nice to dream, but realistically, you're not going to see Tesla cars offloaded from the ship in Adelaide any time soon. Not unless volume surges dramatically, and frankly, I can't see that happening. Not at current pricing.
Half-Life 3 confirmed!
... oh. Wrong forum. Never mind. (I've never even played Half-Life ...)