Hey guys - New WRX/STI owner (Hasn't arrived actually, but soon..)

Has anyone refit one of the active auto dimming mirrors on our AUSDM cars? I'm just wondering if the AU delivered models have the wiring loom already in the roof like U.S cars?

eg. Subaru WRX, STi Auto Dimming HomeLink Mirror w/Compass 2015, SubaruGenuineParts.com

Installation: https://www.youtube.com/watch?v=xaKSZ68ge9o

I'm interested in MY15 but I'm sure if earlier cars have the loom MY15 is likely to as well.