Wiring diagram of this blue 12V switch? I'm looking for a wiring diagram or some information about the internal connections of this switch from the blue train era.



It is used for controlling the automatic points, and is visible on the original box:



The points connect to the back of the switch using a 3-pole connector:



I want to use a microcontroller to operate the points without manually pushing buttons. Since I don't have any of these, I cannot measure the connections (using a multimeter).

Does anyone own this switch, and cares to share some information?



This is how I think the switch works. I have tried wiring it this way and it works, however the points barely move. Perhaps the problem lies with the solenoids inside the points?
In electrical engineering one might call it:
DPDT (Double Pole Double Throw) Momentary (On)-Off-(On) Reversing Polarity Toggle Switch.



Momentary in this configuration means that it's spring loaded towards its centre position.

Edit: I'm not sure though, see the comment below. I have the remotely controlled switch points from the gray era and they work like above.