Does anyone know how the tail light bulb housings are secured to the tail light assembly? I've got two that are falling out and I can't seem to get them to lock back into the assembly. There's another thread I found referring to a similar problem, but I don't think it mentions how they are supposed to hold in place. Are they just meant to jam fit? or do they push in, twist and lock? When I push mine into place they just fall straight back out. On the other tail lamp, they are really tight and look like they wouldn't come out even if I needed them to. Any help appeaciated.....