The level of protection will be huge. In my experience, they’ll be in a unit where there’s a locked gate to a locked door, to a locked lobby, to a locked corridor, to a locked cell…literally layers of protective measures to keep them safe.
I don’t think many people care whether these two (three?) live or die, but they segregate them for the smooth running of the prison - basically, to avoid riots and a murder in prison grounds.
All meals will be delivered to them, medical staff will do “home calls”, laundry done for them. They’ll have a TV/books etc available and will have a larger cell as they’ll spend their whole day there.
They'll lock the prison down for visits or agent meetings (meetings with their lawyers if they appeal their sentence) to protect them from others. Even staff contact is limited as I suppose there’s always potential that they could cause harm too.
It’s shit, but that’s the reality. They’re in zero danger.