I would like to add some missing informatuion for a film but do not wish to become a Member to do so.

RIDE IN A PICK CAR aka RETURN OF KID BARKER. Every synopsis I have ever read about this film there is one piece of missing information . I need to know how I can submit this 100% bone fide information without actually having to become a member, as I am unlikely to ever use the facility again. Basically the owner of the pink Cadillac who is seen driving it in the film is (was) a very famous American musician who also has a speaking part in the film but does not appear on the credits. He was a peronal friend of mine so I know the information to be correct.