potentiometer help

I am using two of these motor controller kits to build a tank-like vehicle:

https://www.electronickits.com/kit/complete/motor/k166.pdf

With one controller for each motor I would like one pot to control forward and reverse and one for turning. How would I do this?

I have tried to just wire the pots in parallel and that does not work.

Thanks

Any help would be greatly appreciated.

Why you use two kits ?
You want to activate the motors (to switch between motors ) using pots ?

Wire the "Forward/Reverse" pot with R2, 10kΩ to ground and R1,39kΩ (instead of 100kΩ) to the plus voltage as shown on the schematic but connect its wiper to the wiper of the "Turn" pot. Connect one end of the "Turn" pot to one of the controller inputs IC1:A-3 and the other end of the pot to the other controller IC1:A-3 input. Also connect resistors from each of the IC1:A-3 inputs to ground. (Try 100kΩ to start, but you may need to experiment with the values to get the desired control function).

That should more or less give you the control functions you want. The "Forward/Reverse" pot will control the speed and direction of both motors. The "Turn" pot will vary the relative speed between the two motors.

Thanks that works for what I needed.