Honestly thats a simple question but i've never had to do it. For some reason im thinking the two ends come apart (the part that the antenna screws into), and... the pl-259 end (the part that your cable screws into.) Should leave you with a threaded rod off of the pl-259 plug. I don't have a picture to help ya, but one you have them apart, your aluminum mount should come free now. If it were me i'd put a hoop connector on the rod (plastic washer first if you had one) and then screw the part that you unscrewed back together. If you had the washers it would be as follows. from the underside of the mount pl-259 plug, plastic washer, mount, plastic washer, hoop connector, then the threaded chrome piece that screws the assembly tight. With the hoop connector, i'd run a wire from there to somewhere on your bed, frame, etc. If you would like anymore info / help / etc, just shoot me a pm anytime.