What is this wire for? It's broken and I'm sure it needs fixing.

[mechanicalhorizon]

I was replacing my brakes earlier today and saw that this wire, on the driver's side, was broken.



I have no idea what it's for and don't know what to Google to figure out what it is and what it does.

It looks like it attaches to a "circle" on the wheel well panel.

I'm pretty sure it shouldn't be broken.

Can I simply just splice it back together or should I replace it completely?

[rckstein]

Here's several other threads on it:

ground wires from body to front struts?

Broken ground wire from strut to chassis.

[mechanicalhorizon]

Thanks, I wasn't sure how to describe it for searching.