if you have it in the car, either have it your person (open carried) or in plain sight. Some folks have a holster secured to the dash board or have a rig that attaches to the shoulder strap of the seat belt so it sits on the back support of the seat.
From 1 July 2010 forward non-CHP holders can have a loaded handgun in a private vehicle concealed if it is in an unlocked (or locked if you wish) container or compartment--glove box. See HB 885. There is no longer a requirement to be in plain sight.