for mine, I mounted it on the windsheild in the Blue section (way up top) behind the passenger side visor. This way, I can see it if I want to in the drivers seat, you cant really see it from the outside, and with the visor down, you cant see it at all even when the top is off from the outside. For the sol, the Visor only goes down 90 degrees so i dont have to worry about the visor hitting the VAFC.
If I had a hatch, I would do it like 92b16vx but the sol does not have any cubbies/storage bins like that.