You'll have to call the facility, they do not make information like bed assignment available online. They might advise you that it is not necessary to have that information to get mail to them.
https://www.inmateaid.com/ask-the-inmate/how-do-i-find-the-housing-info-for-my-wife-that-was-transferred-yesterday-to#answer
Accepted Answer Date Created: July 20,2016