66 Barracuda fender-mount turn indicator - screws?

I've acquired a couple more lenses but they're different than the one I had.

The metal tube - should it be part of the lens like the one shows or is it part of the bulb holder/wire pigtail that I still need?



Oh, and can someone show me what the screw/bolt that holds the entire assembly onto the fender looks like? Even just the dimensions would be helpful.