This switch connects to any Power-Cube "V3" or 030/031: 2x 200A PDB and acts like an manual power on/off control.
It isn't just a "switch". There is a small PCB included into the main wire which implements an current control mode, rather than a simple on/off.
Status of the white (switch) wire:
0.0V = No switch connected
2.5V = Switch connected / not pressed
5.0V = Switch connected and pressed
REMARK: Maximum LED current (yellow wire) 2mA !