This switch retrofits the older power supply enclosures such as Model #AA-110040x. **Most** II, II+, and IIe power supply enclosures can use this switch. Model #A2M001 and 605-5703 can NOT use it nor can the IIgs power supplies.
The switch is “friction fit” so no screws are needed, and installation is a snap (literately). You can solder to the switch or use standard spade connectors.