help wiring cheap throttle to Curtis 1510-5201 - 4 throttle wires???

Hello my wonderful forumers

I recently purchased a 250amp curtis controller to run my (max) 300amp etek motor. I have 4 7amp SLA's driving the whole setup and would like to know how to wire the throttle cables to the controller.
has anyone had any experience with these controllers? how do I find out which cable is the 'wiper' high' and 'low' ? what could I use a AA battery and hook it up to two random cables and check the resistance? how do I do this?

I would so greatly appreciate your help as I am new at this and would love to contribute when I learn lots more on EV's

thank you very much for reading thus far and I hope you have a lovely day!

yours

Nad