In advance, pardon my ignorance. I don't have a Jeep.
I've done 2 installs under the Dash, left side. In the current one [Montero Sport], I set the Controller forward toward the Firewall, with the Display and Adjustment Knob 'just' accessible. It's horizontal. No Knee conflict. Once I set it for a given set of conditions, I don't touch it again during a tow. It follows Brake Pedal force.
In a prior install, I mounted the Controller in the same, left position. I tilted it up at a 45 degree angle. To the best of my knowledge, being all-electronic these days, a Controller could mount totally vertical.
Tekonsha Prodigy P2 Controller