i believe u r refering to the robot controller and the operator interface. the two black panel things. if this is the case the one that says robot controller goes on the robot. you connect your sensors and relays and speed controllers to this box. the other one is your operator interface. this one you hook up you joysticks and any other control boxes to any of the ports 1 2 3 4. umm anymore questions goto
http://www.innovationfirst.com/FIRST...umentation.htm this will help u wire the stuff up. i hope this answered your question if not if u could explain better to me what u r looking for i might be able to help u. Christi team 93