Ground wire replacement

What is the easiest way too replace my engine too firewall ground cable the bolt on the back of the motor seems really tricky to get too???

 

That bolt under the cam cover for the ground is a real pain in the arse any tips

 

Pics?

 

That looks doable with a 1/4” drive socket wrench and ratchet. Or a box end or open end wrench. Also they make open end wrench attachments for a ratchet. I’ve also had good luck with distributor type box and wrenches. They have unique bends to them. Need to get creative with different attachments. Universal joint and wobble attachments may help as well.

 

Here is what I ended up doing
Accidentally snapped the fitting off never got the bolt out so I checked with my mechanic and my voltage gage and this is the working finished new setup

 

A tool that became my best friend when I did headers was a 14mm ratcheting box end with a swiveling head. Looks like the weapon of choice for this kind of thing.

 

If I had some of those I think they would have made the difference today but new ground location works beautifully also and much easier too access