I have just purchased a Chinese 6040 CNC Router,Milling/Engraver through ebay. The mechanical assembly has been completed but due to a poor quality single page photocopy I am unable to connect the AC input cable to the VFD box. The earth in the VFD box is located in a different position in the VFD box and is shown as chasis earth, which I am assuming will be the same in terms of earthing. The instructions also show the other 2 connectors to be connected to terminals R and T? What does R, and T stand for and what wires need to go where? I have a blue wire and a brown wire to connect. If someone could please advise it would be much appreciated.