Nostalrius Begins - Quality wow vanilla realm (1.12)

Where are these stored? Try as I might, DUF remains a fucking mess for me on PTR since it has to be manually tweaked per character. Can anyone offer some insight? Thanks.

discord addons save their variables accountwide.
if you access the PTR with the same account you should be able to load the profile ingame.

if you want to speed the process up in the future you can copy your DUF settings in the _DEFAULT.lua file in the DUF folder, this way on every new char you will load these settings first - but you gotta check for the correct spelling.