If only your vehicle had a glow-in-the-dark antenna to make it easier to find, you wouldn’t be in this situation. Faced with just such a problem himself, Instructables user [botzendesign] has ...

To hook up the new cable, you'll have to remove the car radio. Fixed-mast antennas are much easier to replace. Buy a universal kit (about $15) from any auto parts store. To install the new mast ...