New 2012 Sport. Got a BX1126 Blue OX baseplate. Took bumper off. Instructions say to inset hex nut into middle hole and attach whiz nut on backside. There is a hole big enough in the bottom. That works ok,though kinda agravating. Next is to drill 2 top holes in the square frame and insert the whiz nuts thru the face plate where the bumper attaches. The holes on the bumper plate are not large enough for the nuts to go thru. Anyone done this? Is there a secret passage?