2021+ Lexus IS350 Subwoofer/amp/LOC/wiring kit install (non Mark Levinson)

Quick video on how to run power from battery to trunk and how and where to splice your pre-amp wiring to get signal for the LOC. This process should be the same for all 2021-24 Lexus IS series. All my door speakers and dash speakers are upgraded already. I also upgraded the OEM sub to another 8 shallow sub in the factory location.. that video is under my public videos for my username. Sadly, that wasn't enough bass for me, so added this little 8 and a small mono amp. Now it's perfect. This way I can unplug my amp and take out the sub in the box and still have an ok setup if trunk space is needed.
Here's the parts list I used, all available on Amazon, about $285
Subwoofer - Skar Audio Single 8" 700W Loaded SDR Series Vented Subwoofer Enclosure | SDR-1X8D2
Amp - Skar Audio RP-350.1D
LOC (Line out converter) - Kicker 46KISLOC2
Wiring harness - InstallGear 4 Gauge Amp Kit