My AX500 came with a resistor attached to the VCON terminal, but I did not notice where the other end of the resistor was connected (appeared to be somewhere under the terminal block). When connecting wires to the terminal block, I noticed one end of the resistor is now free. I cannot find anywhere on the board that it is supposed to go and it does not appear that the end is fractured. I cannot find any schematics where this is supposed to go - am I supposed to connect the switched power through this resistor?