there are 2 types a) from the link - this has a thread on the top and the 12v connects to that - the connector has a shoulder which makes the earth(0v) the other type :wacko: which are the same basic plug has two wires (more modern replacement) which requires a small modification to the connctor - either will do (I got mine from hans motors as per the link and it is still going strong after 5 years - touch wood)