Connecting Two Synchros (Master Slave Indicator)

[ProDave]

One for the control systems boffins here.

I'm trying to work out how to connect up an old ships weather station (wind speed and direction) for a neighbour.

The nuts and bolts of it are the sensor, and the position indicator, both contain a synchro.

I believe they connect together. with an excitation voltage as shown in the diagram here on this wiki page http://en.wikipedia.org/wiki/Synchro

The rating plate says I/p 100-110V 50/60Hz o/p 90V  so that's clear enough, excite it with 110V ac.

But my question is, identifying the cores, i.e finding out which pair are the rotor.

there are 5 coloured wires:  red, yellow (twisted pair) White, black (twisted pair) and a blue.

So one of the twisted pairs must be the rotor, but which one?

Are there standard colour codes for synchro's?

EDIT

About 5mS after posting the question, the answer is obvious.  Just check with an ohm meter, the rotor only connects to one other wire, any of the leads from the stator connects to two others.

so for anyone looking, the white and black are the rotor.

And it works.