Wait a minute. 1+ (red of motor one) 1- (black of motor one) 2+ (red for motor 2) 2- (black for motor 2) if you got a pair like I did (derp! PL1 covered that part already

). Switching is done via the control/usb with the joytray.exe. Now you can add the command line entries to each game start to go to the respective 4/8 way. Also if you use mala "daoldman" made a mala plug in that can spare you having to add an entry to each game launch along with a couple other features. His plugin reads from the control.ini and will switch based upon that during game launch. If you were gonna go with a toggle switch you need to permanently (no going back) kill the usb feature of the board and splice the toggle or buttons to the cut usb cable.
*edit* each motor needs it's own connection for the purposes of knowing when to stop them via resistance when it reaches the end of its travel.
*another edit* to use buttons to switch with an ipac you will need to reassign 2 switches on the ipac to use F4 and F8 along with the joytray.exe running in the back ground.
good day.