battery replace

Hey guys, I've got movement in my passenger rear lower A arm where the spindle goes through. It's quite noticable and clonks when driving. What is worn to cause this? It doesn't seem bushed so is it the arm, spindle or hub that will need replacing?

Hi, Can't get me head round this computer malarkey. Hopefully this message is sent out. I only want a battery for a 1970 arizona import 240z. Brand/price/details gratefully received. Don't know anything about cars. But I freakin lone my Datsun.