From what I understand, there were only three theaters with THX certification during Jedi’s original release, one in Los Angeles and two in Dallas. All three showed Jedi in 70mm.

The “premiere” location could only refer to Avco Center in Westwood, Los Angeles. That was the only THX location in L.A., but there was no official “premiere” for the movie IIRC.

I can’t determine for sure, but I think there weren’t any more THX certifications until 1984, when Indiana Jones and the Temple of Doom released with the Broadway trailer. So “Wings” may well have only ever been seen at those three “test” locations.