What brand speaker are hooking up? Did your speakers come with any speaker wires at all? DO NOT SOLDER TO THE SPEAKERS. If the connectors from your adapter don't fit your speakers find some that do. Go to Walmart or Best buy and get some that will fit. If I'm hearing you right your speakers connectors are the same size as each other, correct? Then you only have to cut one of them and replace with a new one. Or if your speakers came with wires use those and splice into your adapter( just a short 6 inch piece will be enough)
