OK, I'm new. I just bought an MTH Z-1000 transformer and have no clue how/where to hook the wires from the track. I have two MTH connector tracks and have put them at opposite ends of my 11 ft. oval. I'm running an O-gauge Railking Challenger and 5 Premier passenger cars. Do I hook the leads from the track to the transformer itself or to the controller? Do I twist the leads together (++, --) and then screw them onto the back of the transformer? One screw on the transform says "+" and the other "-". BUT, on my power-connecting track it lists a "U" and an "A", I think. What goes where? I'm using 16 gauge wire.
Kent in SD