I have a 2002 renault clio. Due to the recent lockdowns I have not been driving anywhere and as a result my battery wasn't in use. I now need to replace the battery so went about removing the old however in doing so snapped the head of the bolt that secures the battery in place. While I can now remove the old battery I am left unable to ensure the new battery is safely fastened in position.
I did some research on how to remove a bolt which has a snapped head and came across the method of drilling a small hole in the bolt and using an bolt extractor set to remove it.
The below image shows the stuck bolt and the hole I drilled into it. While I can thread the extractor into the hole I can only get so far before it refuses to budge any further and as a result the bolt is still stuck unable to be removed.
In light of this I am looking for some advice on how I can remove this bolt?