For those that are interested, all the parts arrived and as the weather was rubbish and I refuse to go out and get soaked to the skin, I decided to get it all sorted.
Take 1 stick welder.
Dismantle the casing and remove the old cables.
The new female fittings have a small lug on the insulator them to stop them turning when you fit the cables.
Fit the females and crimp some terminals on the solid ally cables off the transformer and connect them all up.
I cut the cables to give me 1X 2mtr for the earth and 1X 4mtr for the electrode holder and these are the new earth clamp and electrode holder.
I fitted a terminal on the earth lead first.
And snugged it up on the earth clamp stud.
Then fitted the male connector on the other end, this is the same for both the earth clamp and the electrode holder so won't bore you with two of the same piccies LOL
Measure the insulation that needs stripped back.
Fit the copper wrap around that will protect the cable as the allen bolt is tightened down.
Tighten it all snuggly.
Slide over the insulating rubber boot and job jobbed.
Then fit the cable on the new electrode holder.
Measure and cut back the insulation to fit inside the holder.
Slide in the copper clamping strip.
Tighten it all down, slide on the cover that doubles as the handle and job jobbed.
Fit the male spigot on the cable end and voila, all done.
Will test it out tomorrow night if the weather stays dry