I'd think that there'll
almost certainly be a sub-loom available that you can plug in somewhere to make the Oz mirror back signals plug & play - cos there's
no way that BRP individually wires each Aus/NZ spec Spyder as it rolls down the production line!! :banghead:
Somewhere along that production line, or maybe during the initial loom assembly stage, one or more operator/s will simply grab that sub-loom from the rack/shelf/box; plug it in to the main loom at the appropriate spots; then someone on the main production line will install that Aus/NZ spec loom with mirror light sub-loom attached onto the frame; & finally someone else'll connect it to the mirror back signal lamps/units as they get fitted/the bike goes by....
All you gotta do is identify the part number, where it fits, & then find a supplier... for the OE sub loom & the mirror back signal lamps!

. Simples!

hyea: