Last night this wire rusted and fell down while I was changing high beam bulb. A tiny spring fell in the floor from the circled bolt. The wire comes through my firewall and runs up past the batter and connected to the bottom of that bolt. That bolt makes connection with the hood. What is it for...because this morning as I accelerate my power cuts out intermittently...I didn't wrap the wire off so I'm thinking it's connecting to metal somewhere shorting out?? Anyway, I want to fix it but I cannot find any photos of what that wire is for? I though a ground but now it seems like if I had a under the hood bulb it would be for that. Just FYI, I have no warning lights on, my remote start works as does the horn and after market backup camera.