Anything 'electrical' this chap is always my first port of call. he knows his stuff. Send him an email - he will probably be able to sort you out something.
I have 5 of the sockets left from this thread Linky
You just strip the wires back and fit a fully insulated spade to the positive wire and a partially insulated one to the negative wire and connect the positive to the
centre pin From what I see they are a direct replacement with just 2 spades instead of fancy terminals
yup-the one in the starter motor cover. One of the wires has just corroded through and broken inside the male side, and there isnt enough left to repair.