I opened the box and there is an extra bolt and nut that the instructions says nothing about. Also on the pic on the instructions, the box and hovabator pics on other sites the wafer, the high low piece and the piece under the top which the wafer attaches to all are located in the center between the two windows, but on my hovabator the piece underneath with the wires and the high low piece ontop are located on the side. Am I suppose to move this? the instructions say nothing about this.