How to access backup SRAM of STM32H7?

The STM32H743ZI MCU has 4 Kbytes of SRAM in Backup domain.

Is it possible to access this back up RAM?

I have found and tried this that works for the F429

But the RCC registers are a bit different on the H7

RCC->APB1ENR |= RCC_APB1ENR_PWREN;

is not found found in RCC_TypeDef.

Thank you.