I have an older panasonic stereo and am not sure where to connect my small external antena as it has 5 different terminals in the back with a built in small antena that kind of hinges in and out a bit can't make sense of the 5 terminals and 3 wires on there now?

Is there any type of labeling present at all ? The 5 terminals are FM Loop (2) AM antenna (2) and a ground.