Ownership of cpanel domains

Hi,

I'm trying to figure out which config file holds the fact that domain aaa.com is owned by user1, and bbb.com is owned by user2.

In short, I want to move ownership of a domain from one user to another, with retaining all files. I can easily move the domain files from one users home to the other, but I need to tell Cpanel as well so the new owner can manipulate the new domain.

I'm not trying to move ownership of the entire account, just 1 domain.

Any tips on how to proceed?