Someone else with more knowledge than me is bound to answer, but isn't it incorporated into the rear window? Not "sticky" style but ultra thin wiring embedded into the glass or similar?

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MY99 WRX sedan WRC blue Sold :(
MY99 WRX sedan Dark blue pearl :D
MY97 Liberty Outback Ltd Wagon
1990 Mk3 Supra turbo fully rebuilt 7M-GTE (Older son)
1991 Celica GT4 (Younger son)