I have an antenna for my verizon wireless 3g usb stick. It has a magnetic mount for easily putting it on the roof. Right now I have the wire just going in through one of the rear doors, but I would like to wire it permanently.
To get the wire into the car, my plan is to drill a hole in the roof, put a grommet on it and then some kind of sealant. Is this a good approach or is there a better/easier approach?