Hi chaps. My last spindle died when a bearing went. I ordered what I hoped would be a direct replacement. But when it turned up the wiring is different. The spindle I had before had the wiring connector clipped onto the spindle. This new one as the wires inside a black box on the front. Inside the lid it states 330v, or 220v. There are three terminals and also an earth terminal. But I have know idea which of the three terminals to use. There are know instructions at all. I was hoping to keep using the original VFD to run the new spindle. The old spindle was 3.5kw, the new one is 4kw. Can anyone please help . Thanks