Radica On switch PCB?

[Aurora A14]

I've come across a dilemma with my Radica (Not because it's a SF2, that's a different problem)

I need to remove the on switch PCB....

Am I right in assuming that when the switch is on, orange and yellow (outer wires) are linked together, allowing the unit to turn on?
And that the inner 2 are for the LED on the PCB, the black wire being for the negative side/cathode of the LED?

(also, first post!)