Might I suggest the book: "South Carolina Gun Law" written by a couple of SC attorneys and a SC LEO.
www.scgunlaw.com
Keep in mind, I am NOT an attorney! But the way I understand the law is:
#1- A container with an "integral" fastener is key.
So it appears you would be safe & legal if your firearm was in a closed gun case or range bag "IF" that case is in the luggage compartment.
If you do NOT have a trunk, the rear most compartment is fine. If in a truck, the area behind but NOT under the rear most seat is fine.
#2- Under the seat; door pockets; between the seat & console are NO-NO's.
The authors state on page 86 of South Carolina Gun Law: "The best way to stay safe from criminal and civil liability is to keep handguns in safe containers like holsters, purses, pockets, cases or glove compartments."
It would appear a "CLOSED/Secured" glovebox or console is fine as long as the compartment can be/IS "SAFELY" secured. This is true for permit holders and NON permit holders alike.
Furthermore it would seem:
IF you are a CWP holder, you can keep it "ON or ABOUT" your person; BUT "not" loose in your vehicle. This seems to include holsters and purses.
IF you choose NOT to keep your firearm in the glovebox or console and opt to transport in a gun case, range bag or "other" container with an "integral" fastener the container must be kept in the luggage area or rear most compartment.
What my LEO friends say:
They do NOT want a gun kept in a place where it is easily accessible by the occupant or occupants of a vehicle. So, if a person is alone in the car a gun case or range bag on the back seat
(where luggage would be kept if you were driving on a trip alone); is "most likely" fine IF you have a CWP.
(For NON permit holders; any firearms MUST be in the trunk, luggage compartment OR secured in a glovebox or console.)
HOWEVER; "IF" there are multiple occupants in a vehicle, the bag needs to be in the trunk, luggage compartment or behind the most rear seat in the case of a pick up truck.
I hope this has helped clear some of the confusion.