Installing Nav Lights

[BigMav]

Cheers for all the tips fellas, they are appreciated. Here is one of the lights I picked up today. They have this annoying piece of plastic sticking out the back of them for some reason. Maybe to stop it twisting on the single mounting screw? The picture I have taken is without the rubber gasket that comes with it which appears to be the only thing to keep the water out. I think I will drill through the perspex using the masking tape method and maybe a gromet if I can keep it flush. I will drill a hole for the white tab aswell and poke the wires through it. Will get around to it and post a pic of the finished job. Hopefully I won't be buying any perspex this weekend!

[TheSaint]

That annoying piece of white plastic helps hold the lights in place..