Final answer:
The blank in the student's question should be filled with 'safe storage location', emphasizing the importance of safety when handling staple guns which should be stored properly when not in use to prevent accidents.
Step-by-step explanation:
The student's question pertains to safety procedures for handling staple guns. The blank in the question should be filled with "safe storage location" or a specific term used by your educational or work institution such as "cabinet" or "storage case". The complete sentence would be: "Always keep the staple guns disconnected and in the safe storage location at all times when not in use." This is an essential safety practice to prevent accidental discharge of the staple gun, which can cause injuries.
When dealing with staple guns, it is crucial to follow all safety protocols strictly, including wearing safety glasses, keeping fingers away from the trigger when not in use, and never pointing the staple gun at yourself or others.