Connecting a rotary encoder to 9923

Hi,

I am trying to connect a rotary encoder (Model VERT-X 13E version B) to NI 9923 and ultimately to NI 9403. I can not figure out how I should connect the wires. Which slots are designated for the positive and which ones are for the negative. This encoder is suppose to read the position of a piston . It is installed on the flywheel. I have attached the info about the encoder. I tried different set of connections but it doesn't work.

Any help is appreciated

Thanks