Here's a stupid question - as I open my trunk on the 68 satellite to change the burnt out bulb in the round housing, I am unable to just pull out the socket and change the bulb like on the rear tail lights. The bulb seems to be sealed in there somehow. Is there a trick? I do notice the housing in the trunk has a hex shape so is this to hold onto with a wrench? The service manual provides no guidance on this and I don't want to break something.