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Turn the 'ball' downward 90 degrees...so the openings are headed UP and DOWN. Grab the outer edge of the ball and pull it out. Clean the old seals/glue/ whatever off the opening on the dash panel. Install the new seals where you removed the others. Orient ball as it was when you removed it and pop it back in. Rotate it to its normal position.
You can do the same thing with a strip of black felt from a fabric store. Just use double-sided tape or some weatherstripping adhesive. There is no force placed on the except for the smooth surface of the ball. The adhesive isn't the 'weak link'; the fabric just wears out. Pull the ball, clean surfaces and glue in new felt strips, insert ball. Voila.