Euro Clear Tails Question

[JoeyBello]

I just got the euro clear and red tails off ebay.. i was looking at them today and their seems to be a gap between the actual lense and the black plastic part behind it.. kinda hard to explain but the lense red or clear depending on what part is connected to the black plastic that turns into the the back where the lights go and there is a clear gap.. did I get a defective pair or are they all like that? I havent taken the stock ones off and looked at them, but it looks like its poorly made and water will get in there. Anyone else have these? not the BMW red clear.. which are a dull clear.. that i call white.. these are the crystal clear ones.. also I looked real quick at the back of the stock ones.. and it looked liek only 4 little wasers hold them in place.. is that all that needs to be removed to take them out? the stock bulbs are connected to the back cover and the harness is plugged into that.. the new ones have the harness on them.. so do you just plug into these and ignore the stock back piece? any feedback would be helpful.. thanks