Is something missing?

[CliffA4]

Hi there, I'm wondering if something is missing from the bottom of my gearbox. It's an A4 B5 1.8t 5 speed manual quattro. I've never noticed the shiny part in the picture below.


Also when I removed my undertray this hex socket bolt was sitting on it, does anyone know where it could be from? When I had the larger turbo installed by a mechanic he couldn't use the stock turbo bracket that supports the turbo, could he have put this bolt in loose and it's just fallen out or is it from somewhere else. I've looked around with a light and can't see where it may have come from, please help.