I didn't have to solder it on, it has a 4 pin plug instead. Here is a picture http://www.amazon.com/gp/product/B004XMOS22/ref=oh_details_o00_s00_i00
Oops, my bad. I thought our machines were similar enough, but it looks like they finally solved the issue I had by making it so you can't wiggle the pins when you trip on the cord. Sounds like a faulty replacement unless the socket frame has a chassis ground point on it... Double check your cord socket.