VR2 Wheelchair Motor Controller

Anybody familiar with this controller for "Shoprider" and "Jazzy" wheelchairs?
http://www.pgdt.com/products/vr2/index.html

I have the controller and two motors, but want to control the motors wirelessly.
Need to know what sort of signals to input the 4-pin connector to simulate the joystick.
Thanks!
John

I don't know, but I would guess that it is a CAN-BUS. Another option is RS232. You should look at the signals with logic-analyzer.. or ask the manufacturer.

EDIT: You might have more luck here: https://www.wheelchairdriver.com/board/

I found couple of projects that try to "hack" the VR2:
https://www.wheelchairdriver.com/board/viewtopic.php?f=2&t=3357&p=43579&hilit=vr2#p43579
https://www.wheelchairdriver.com/board/viewtopic.php?f=2&t=3261