The newer revisions of those won't fit on 2020s unless you change out the panel it mounts to. I've been unable to find an original and had to learn to live with it.
Yeah, I went with the drain plug underneath the passenger seat. I wanted to try going under the cowl and through the space behind the windshield frame and run it under the passenger side floor panel but the ARB harness wasn’t long enough for that.
On board air. Picked up this kit from Innovative AT Products. Owner was very responsive on Instagram to a few questions I had. Now I need to figure out if ArmorLite is still an option or not.
Also replaced the original battery with a DieHard and bypassed the Aux battery.
Here is my setup that you may be able to modify to your needs.
Offroam air vent ball mount (17 mm)
Spigen MagSafe charger
I removed the arm on the charger and connected it directly to the ball mount. The only thing I've changed since the picture is moving it to the passenger side vent and...
Finally did this today when I replaced my main battery. Took her for a test spin around the neighborhood and no issues/lights/warnings. Now the Aux battery can sit down there alone like the red headed stepchild it is.