I ordered some speaker connection plates with gold binding posts from Parts Express, plus some of that foam seal.
Here are the ports I made. One is painted black and the other unpainted. I installed the painted one and left the other speaker port unedited. What difference should I be hearing? I have these speakers downstairs on a thin piece of carpet on concrete. The speaker with the port edit seams to have a little more bass resonance than the unedited one. The unedited one seems a little more punchy? I haven't done the foam seal around anything yet, nor have I moved the tweeter to the front of the tweeter baffle. While I am disconnecting the wires to add the new binding post connections and to move the tweeter, I picked up some 18ga hook-up wire from Radio Shack to rewire from the 30 plus year old wire that is in them.