[cctalk] Looking for service info for a Wang 600

Hello, I bought a Wang 600 in unknown operating condition, but it looked to be complete and undamaged. Unfortunately, the shipper used a "professional" shipping service that wrapped this calculator in a single layer of bubble wrap, put it in a single wall box, and filled the rest of the space with packing peanuts. The result was predictable. The rear and sides of the molded ABS case were completely shattered, the rear mounted fan was knocked off, the housing bent, and a fan blade broken off. Fortunately (if that's the right word) the chassis, cards, keyboard, and display all seem intact. To try to assess the extent of the damage, I would like to complete the removal of the plastic case but do not see how it is fastened to the chassis. Can anyone help? Also, any troubleshooting info would be appreciated! I already have the schematics, but I probably won't be needing them until I do some inspections and basic checks. Thanks, Stan