1993 Buick Lesabre Power Antenna motor won't stop running..

I have a power antenna and would like to just unplug the thing. It's stuck in the up position and is running down my battery trying to pull it back into the housing for the antenna. I know there's a little black box with wires coming out of it attached to the housing but i was wondering what (if anything) should i unplug or if there's a fuse i can take out?? i really dont want to replace it..it just seems like a pointless extra to me. But i want to unplug it safely and the right way..any help is welcome..thanks!