My Redarc Elite is double sided tape plus zip tied under the driver side dash. There is a nice flat spot in the dash support structure where the module can be mounted solidly (which is critical for this controller )
The control head is to the driver-side of the Aux Switched on a 3d printed panel with a couple RJ45 jack for radio mics.
The the 3D panel came from this guy.
JAGarageDesigns - Etsy I had to trim and sand a bit.
This is the third time I’ve used this controller in a build, and I still think it’s the best available for overland towing.