The address of the theater is 1262 Westwood Boulevard, Los Angeles 90024.
The address of the parking structure is 10866 Wilshire Blvd but it is a bit misleading as the entrance is on Glendon Street directly to the left of the LA Library, Westwood branch. A photo of the structure is below.
You can enter through either of the two entrances indicated as VISITOR you can see on the photo. You will take a ticket from the automated booth, enter and park anywhere on any floor that is not marked RESERVED. Really important not to lose the ticket.