MDCAT Help

Hello.
Overseas here.

The mdcat process is quite confusing for me in forms of the provinces and locations.

My question is, if I want apply to AKU then which provinces MDCAT should I be giving? (Federal- SZABMU, Sindh, Punjab- UHS)

And what happens if I give my MDCAT in Riyadh (international test centre) then how can I apply to my chosen public universities ?

And can I use one of my parents domicile ?