It's not exactly the same as a biological heart transplant (I assume), but you might be interested in reading the surgical instruction manual for a SynCardia artificial heart: https://www.accessdata.fda.gov/cdrh_docs/pdf3/P030011c.pdf

For instance, there's a fun diagram on page 11.

There's also an operator's manual for the "driver" that powers the heart: https://www.vumc.org/cvicu/sites/default/files/2020-03/Opera... Which includes all kinds of (appropriately!) paranoid warnings such as:

> To avoid accidentally switching off the AC power to a docked Driver, do not plug the Driver into any electrical outlet controlled by a wall switch.