Some people do it a little differently, but it really doesn't matter too much.
Set Disc # for each, and ensure Album, and Album Artist (auto) is the same for all tracks. Album Artist (auto) requires that either Artist is set and singular, or Album Artist is set (when Artist varies across tracks or you want to group the album under a different name than Artist).
This gives a means to see a multi-disc album as a unit, or as its three components. The default views will show them as one component. It is also generally more consistent with looked-up CD metadata, since this data is referenced by the physical disc itself. Each disc is stored in its own folder, typically labelled (automatically by rules) as [Album] CD[Disc #] or some variation.