Hi @Andres1 . I am sorry but I have changed of project and currently I just dont remember… Maybe my old post about searchs can be useful Problems enabling Open edX Search - #3 by Yago Maybe you can search for this issue in Slack and ask there if someone has found the solution.
BTW I use to do a big search for variables, for example from /edx, to find where the variable is set and used. Check out How to use grep command in UNIX / Linux {With Examples} if like me you have bad memory 
Good luck!