I decided to upgrade my low beams and ordered Philips X-tremeVision + 100 bulbs. When I tried to install them, I found the stock Mazda bulb has 3 plastic "ears" to hold the bulb in place and the replacement bulbs are round without the ears. Am I missing something? Is there a way to install the Philips bulbs that I fail to realize, or are there no up-graded bulbs that fit our cars?