Jack car up, slacken the wishbone nuts and push this out of your way.
Slacken the nyloc nut on top of the ball joint and remove.
This could be difficult to remove so having a ball joint splitter handy will help.
Buy new ball joints, nuts for the top and 6 new wish bone nuts if you want to do it belt and braces.
you can mark the position of the wish bone/ball joint connection before removing but I found mine was slide out to its max on the wish bone.
To be 100% sure you can get a 4 wheel alignment done after this too, but I didn't
Ta for that.
Keep ya's all posted