Drill a hole in the sink with the drill. This keeps the drain hose dried out and keeps any odors from backing up into the dishwasher.
With this improper installation, sewer gases have the potential to come back into the dishwasher. Once you have tightened these up, try the dishwasher again, and repeat until your floor remains dry. Listed airgaps shall be installed with the flood level FL marking at or above the flood level of the sink or drainboard, whichever is higher, or separately trapped with the airbreak located on the stand pipe.
Once you're ready to begin, place towels around the sink, with the bucket directly under the pipes.
Typically, when the dishwasher is in its drain cycle, you will hear a gurgling noise coming from the kitchen sink drain. This is a device that actually mounts above the sink. You or your assistant should be screwing the nut while the other holds the system up in order to prevent it completely twisting around while the tightening is going on.
Local plumbing codes generally dictate the requirements in your area. Take the cover, and place it away from the other pieces. Too bad for them.