It's not clear in their past press release:
https://static1.squarespace.com/static/5...4/Press+Release+-+Saskatoon+Projects.pdf
There's still an available CRU in each the Nutrien and East Towers facing the plaza. Neither are particularly large (the East Tower space looks bigger) but maybe they are planning for a pretty cozy little space.
The other possibility is the top floor space in the East Tower.
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