This file cabinet has L shaped cut outs and a section of metal bent outward to act as stops to keep the drawer from being pulled out all the way. I bent these back in and removed the drawers.
You will need some hardware as pictured. The size does not matter as long as the screws, nuts, flat washer and lock washers all fit together. You will also need ring terminal crimp connectors and wire.
You will need to make three cable assemblies. Two of them will have a ring terminal on both ends. These are to electrically connect each drawer to the back or side of the inside of the file cabinet. This needs to be done because the plastic slides that the drawers slide on are not conductive. If the file cabinet you use has metal bearings, you will still want to attach the drawers to the inside of the file cabinet to insure a good electrical connection. The other cable attaches to the outside of the file cabinet to connect the file cabinet to a metal grounding rod that has been pounded into the ground.
The cables that connect the drawers to the inside of the back of the file cabinet need to be long enough to allow the drawer to be opened up all the way. You may want to make them long enough to attach both ends of the cable while the drawer is outside the cabinet.