Nishijin "B" NFL Football - Tulip Question

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I have a question regarding two tulips on my NFL game. I attached a picture.

My tulips A and B do not open. These are the tulips below the football field.

When a ball enters the top referee, the ball falls down through the referee, enters the football field by the left player, enter the field and scores a jackpot. This is all good.

How do tulips A and B open?

Balls cannot enter tulips A and B from the side.

Tulips C and D operate independently and properly.

Holes E and F operate properly and have no effect on tulips A and B.

There is no outhole underneath the football field to feed A or B.

How are A and B suppose to open?

Thanks!!!