I just got a 301A and mine has the cords like this: The 3 pin connector that goes to the standard terminal is only wired at 2 pins and has a plug on the end for the power. Then I have another cord for the foot controller that has 2 pins and plugs into a smaller spot lower down towards the front on that same side.
I also have another 301 waiting for work done and it has a different cord set that plugs into the terminal that has 2 sets of wires, one cord goes to the power plug, the other to the foot controller.