My front navigation light is not working. Tracked down the problem to the wires being disconnected from the light. In order to reattach these wires I need to remove the light. Here lies the problem. There are 3 screws attaching the light to the boat. 2 are easy to access as they are open. The third is underneath the red/green lens cap. I can not figure out how to remove this cap without breaking. Anyone know how to remove?