Based on the answers provided, the following corrections need to be made to the 3D object:

1. Add four holes to the object. The object is currently a solid cylinder and lacks any holes.
2. Position these holes in a square configuration. Currently, since there are no holes, there is no configuration.
3. Ensure that the holes are smaller than the main body of the object. As there are currently no holes, this aspect needs to be implemented during the addition of the holes.