The throttle position sensor is part of the TORS system on the apex. On carb sleds you just unhook the carb switch (black and black-yellow) and plug the ends together to complete the curcuit. This switch usually sticks or goes bad causing the TORS to activate when not needed. With the apex using the TPS as the carb switch, there is no way to unplug carb switch, so you would have to disable the throttle switch.
I would not change anything unless you have a problem. The TORS is a safety feature. Of all the sled i have seen with TORS problems, it is either a bad carb switch, throttle cable free play is set too tight or routted incorrect, or left hand throttle cable is to tight.