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Hi mate, I have a 2021 S5 TIL. Yes I would expect the loom plug is there in your TI to run the Power subwoofer in my TIL. The absense of the Sub in the TI allows to to fit a Twin ARB Air compressor...

I'd recommend you run proper wiring anyway. OEM is the bare minimum required to make noise.
Shielded twisted pair for the signal, and a fused high current positive wire, with ferrite supressor,...

OK, so you have a new Y62 and want to remove the rear panels to do a dual battery setup, some drawers, rear seat removal? Whatever.

Here is what you need to know about taking these trims off.
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