Motors & encoders connection

So, I got the breakout board, the Geckos 320 and the power supply is almost
done.

Now, it's time to start wiring, I found out that my servo motors have 4 pin
connection, how do I know which of the 4 wires is the Arm+ and Arm- to be
connected to the geckos, or does this mean that my motors are double
winding??

Regarding the encoders, they carry 17 pin connector, is there a way to know
which wires for phase A and B, and also the +5V and the ground???
Is there some kind of standard for wire colors???

Help is appreciated.

Mina F.