Unscrew the connector from the sled and insert a long pin in the gap under the contact on the plug (non-wired) side to release the catch on the underside. You should then be able to gently pull out the contact with tweezers or fine pliers. Be careful not to damage the spring part of the contact - they are easily bent out of shape.

--
David
// I'm probably not speaking on behalf of empeg/SONICblue here...