Encoder Wire Colors

[Team3266Spencer]

Could someone confirm this for me with the US Digital E4P-250-250-N-S-D-D-B encoder from AndyMark in regards to the color of the four wires for the cable that comes with the encoder.

Here's my guess:
Orange = 5v
Brown = 0v
Blue & Yellow = Signal (Not sure which is A or B but it can be corrected in programming regardless)

Thank you! Sorry if this is already on CD somewhere; I tried searching for this but I couldn't find the thread I was looking for.