Both sides fitted - loosely. The crank pins have yet to be pushed in properly. DOing this with the engine upright is much easier and much less likely to cause damage to the opposite side. Use the flat part of a small screwdriver to push the pin home. Do not squeeze both sides with your fingers. Fingers are too big and may cause other components to bend or break. Rivets can easily pop out of their holes with such mis-placed pressure.