Snapped ground connection on my car?

So I was trying to clean the main ground connection which goes from the battery straight to the chassis. The connection and bolt was all rusty and I was going to clean the connection but accidentally snapped off the head of the bolt. So now rest of the bolt is still in and I can't get it out. What can be the solution? Can I just drill a new hole in the chassis and make the connection in other place?

Car is Ford Focus LX mk1 1.6 petrol 2004

So I was trying to clean the main ground connection which goes from the battery straight to the chassis. The connection and bolt was all rusty and I was going to clean the connection but accidentally snapped off the head of the bolt. So now rest of the bolt is still in and I can't get it out. What can be the solution? Can I just drill a new hole in the chassis and make the connection in other place?

Car is Ford Focus LX mk1 1.6 petrol 2004 You can, as long as you get a solid metal to metal connection. You can also remove the bolt using any of several tools designed to remove broken bolts. This is what a tech would do. You might need a tap. The Ford Focus doesn't have a chassis. See if you can find another bolt close to the one you broke that is just as good a ground.

This is what a tech would do. You might need a tap.

The Ford Focus doesn't have a chassis.

See if you can find another bolt close to the one you broke that is just as good a ground.

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