help with early fruil modellismo tracks.

just got some fruil tracks at a model jumble.
i have used the new ones with the metal pins(boxed)but these where in a bag.they have hooks which need to be bent over, i presume.in the bag which was opened is a poorly moulded jig just one should there have been two,top and bottom and push together or do you just lay on jig and close hooks with small driver.do you then need to put a dab of glue on them,its looks like they could loosen.there seems to be the right amount of links just no instructions.have these sort been replaced now with the pin type.

gazza.