Rajul,
Thank you so much for the prompt response!
The second (hand drwan) picture is what I needed. I've figured out most of the pins myself, only couldn't decide if red or white wire (pins 1 and 3) was the signal. Thanks for clarifying that!

Futaba square connector is hold together by a couple of latches, so, it's easy to take the connector apart (you can even disconnect the wire from the DSC cord and use it for extending servo leads).

Have nice simulated flying,

Boris