It might be, I believe these are from the late 70s and replaced MV clamshells. In fact some of the poles on the left still have long disconnected remote ballast cans fitted. They never bothered to remove them even after they replaced everything with LED in June.
Hmm I never really noticed there were two PC locations. I wonder if the smaller Unidor is the same way... The Unistyles had two locations. The original Line Material version had the PC on the very edge of the fixture while the later McGraw-Edison version that came out around 1967 had the PC slightly moved up in a more "normal" position lol.