[monk]

Thanks for the information.  Unfortunately, the wires on the antenna have lost their color over the many years they have been in place.  There is a 4 screw attachment point on the radio base and screws numbered 2,3 and 4 are loose while 1 is tight.  Does it make any difference which lead goes to which screw?  As for fastening the radio to the shelf, do I just use screws alone to capture the associated place on the base or do they require small bolts and nuts?