Total posts : 45366
Nolen on the unbalanced antenna screw attach a wire from 5 to 7-feet in length.
Ignore the balanced FM screws unless you have a dipole type antenna.
Ignore the GND (ground).
There is probably a built-in loopstick antenna for AM, with an option to attach an external long-wire for distance reception.
TheLegacy’s cable sytem connection would be perfect if you have the right kind of connector jack on the tuner.