The Fremantle Line goes to Fremantle, The Armadale line goes to Armadale, and the Midland Line goes to Midland. Then there is the Joondalup line which goes to...

Anyway, eventually got there, after catching a bus from Whitfords on a very roundabout route, but getting a bit dark by now. The station is sunk compared to its surroundings and is circled by a ground level bus interchange. A monstrous Westfield shopping mall has been built over the line and around the interchange.
I did manage to spot some Renault artics running here
Some views of the station from the shopping centre forecourt
Note the ramp for buses to cross over the pedestrian areas: