Trick to put the tracks together:
Use a rubber hammer or an iron hammer wrapped with cloth is the trick.
Assuming two tracks are connected without any difficulty. Connect the 3rd track by first lay 2 connected tracks flat on the floor against a wall then use hammer tap 2nd connecting plate as well as 3rd track in. There has a little stopper in the middle of the plate. It is used to stop the insertion.
Wear a glove and use firm but gentle force in order not to bend/damage the track.