Your computer is perfectly secure when there is no power supply connected to it.

Pci and pci express slots, and what looks like ddr2 ram. This picture of featuring 18 year old hardware lol

The binder clip is a “fun” touch.

never leave your old school pci slots uncovered, viruses can come in through them.

Fortunately, network security clips come in many varying sizes, depending on how secure you want your personal area network to be:

That’s a good idea