This amana bottom freezer fridge has a drawer in the freezer section . My question is this ,I removed the door and basket because I had to remove the evap cover to change the defrost terminator . How in the heck do you remove the left and right metal track rails from the plastic guides . On newer models there is a plastic tab you push and the bar pulls right out . This doesn't have that system and I see know way to remove the track rail. What am I missing ?