Trying to add new breakers but no ground

[Ozzz]

My house is wired with bx ac cable the new one with the bond wire
I have lots of Mc cables and I want to add an electrical heater that requieres its own breaker how would I go about it if I use Mc cable which has its own copper ground wire unlike ac cable
Would I be able to put the ground on the buss bar on the far right when I test the neutral and the buss bar for volt reading it gives me zero if anyone can help me I’d appreciate it
Pic with the electrical panel
://docs.google.com/document/d/1-ONj0WRG2GEjmWkvc6AxtBG52jDHpDuHOvQnYapsgcs/edit

 

[Little Bill]

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