What version of BSARA are you using? The Extended Object info is in a different folder in 1.0.0 and 1.0.01.
In Query Studio (or Reports Studio) you need to add Items from the Inventory / Common / Extended Object area (or something like that) - you add the columns of the EO and you filter by the EO name.
I work on 1.0.0, but I can migrate in 1.0.01. I did not know there were some differences.
you may want to upgrade, i ran into some problems w/ snapshots of EOs on 1.0.0 that seem to be mostly fixed in 1.0.01 + hotfixi
You will have to edit the Server Configuration report when you get the data to the warehouse.