I have 2 sets of Kef 104-2 speakers. One has brass speaker binding posts and the other set has a combination of plastic and metal binding posts. It is this pair that I want to change the binding posts on. Looking at the inside of the speaker there is a round milled recess on the inside of back panel. The binding post have a nut which secures the wire to the post and it appears as though the posts are attached to the speaker with a nut as well.