I'm not able to find any useful information about this location online.
It's probably not a public parking, only a visitor and tenant parking for the business park.
On Google Maps, there's a link to Union Investment who presumably owned this property at some point, but the link is 404 and there are no locations in Zürich listed on their portfolio at the moment.
On Chargemap there are 2 markers, one for Alpiq and one for MOVE. On &Charge there's one marker, and the pictures map with the Alpiq location, so it must be one and the same, migrated back in the day.
The chargers are likely not at the same place in the parking, though it's unclear how far apart. The space visible both on Chargemap and &Charge pictures is labelled 005 nord - Besucher.
A second space is pictured on the old Chargemap pictures, that one is a standalone parallel parking space. Text "nur mieter" has been written on top of the images, but on the picture itself there's no special signage, so I presume it's in a section of the parking that's itself marked as private. None of the comments mention this.
Unfortunately no picture allow to confirm which EVSEID is for which of the stations.
On &Charge there's also a picture of the entrance of the parking, with opening hours written above, and ticket gates further down. This area is not visible on Google Street View. There's a panoramic picture where we see the ramp at an angle, and there seems to be a vertical sign before the access road, but there's no picture of this sign. Perhaps that's where it might say visitors only, because otherwise this doesn't seem to be posted at the gate.
Galaxus has a separate short term parking outside, so their customers probably don't use the underground parking.