I got a pair of B&W 601s a few weeks ago and hooked 'em up using some speaker wire I had laying around, bare wire connection. Last night I decided to rewire with the larger gauge wire I typically use and I put the bananas on the wire and then discovered that I could not plug them into these speakers. There is a plastic plug covering what should be the hole for the banana plug. My question is do these plugs just pop out and then the banana will work??? The owners manual mentions that the speaker accepts 4mm banana plugs but makes no mention of needing to do anything to the speaker to be able to make this type of connection work.