What is this mystery part? Someone tell me
So I took off my splash shield a while ago and this metal plate came off and I have no idea what it is or even how to put it back on because it fell while I wasn't looking. It is part #6 in this picture. Anyone know what it is and how to put it back on? I can't really tell from driving if it has any purpose to it but I'd rather have it on then not and I'm gonna be doing some work under the car so I might as well do it then. Any help with this would be great thanks.