Undertray studs

[elite_504]

I seem to have an undertray stud missing off the body behind my offside front wheel, where the engine undertray and main undertray meets.
Anyone got any good suggestions to fix?

 

[elite_504]

Actually, this looks like a good idea:
Repair of Broken Under Tray Studs -

It seems one of the studs got broken when I just took my car for its mot, and I could hear a vibration when I was travelling home. I don't think I'll challenge them to fix it, there is no way to prove it happened there, and generally I prefer to do my own work anyway.