I'm assuming (dangerous I know...) your RX hybrid is the same as my RC in that the car, once Ready and driving, everything operates from the traction battery. The 12v only operates the entry/locking system and powers up the computers for the hybrid start.
Again, guessing but the alarm back-up battery would be attached to (part of) the alarm module?
Just throwing suggestions out there ...
You don't say what year your NX is but the 2015 handbook shows the auto-wiper on is the first position down on the wiper stalk
It is labelled on the stalk, next to the sensitivity thumb wheel.
"DRS Series: 3-20 mm Thick: DRS Series wheel spacers fit between the wheel and hub, and require exchanging the existing wheel studs for longer ones (studs are included)."
https://www.performancealloys.com/spacer-details.aspx?ID=2308
Recommend leaving the a/c on permanently. Not only does it rapidly demist the windows and dehumidify incoming air it will also dry out the cabin generally.
Most a/c system benefit from being run continuously as it maintains the system seals as the refrigerant contains lubricants.
I never switch mine off, ever. done the same in every car I've owned that's had a/c.
Probably posted up before but worth a browse for us newer owners curious how our tech works.. Nothing too deep just some nice flashy images
http://drivers.lexus.com/lexusdrivers/videos/how-it-works
Most of the movement is in the tyre itself. Flexing then snapping back, which what one tends to hear and feel.
This video of the same thing on a Merc GLC, You can see the tyre deform. Thankfully my experience with the RC is no way as bad,,,