Are there instructions on how to use the drum stabilizer bolts?

Yes, you can find them in the Users Manual

call the manufacturer for specific instructions/directions.

To reinsert the four shipping bolts, locate the four holes in the back of the washing machine where they had been removed when the washer was installed. If the plastic hole covers were inserted in the holes, they can be removed. Next, insert the bolts so they connect with the corresponding holes in the back of the plastic liner around the wash drum, then screw them in so the drum cannot move. It may be helpful to remove the lid of the washing machine to get a better view of the back of the drum when trying to align the bolts with the drum liner. To remove the lid, unscrew the Philips head screws on the back edge of the lid. - Ms. Samsung