Pc case cable question (2 pin female)?

Hello! Well i have decided to get a new graphics card and give my whole pc a bit of an over hall! .. Well theres one problem i cant over come. My case has a blue LED at the front of it (just to highlight the case logo) It leads from the bulbs to a female 2 pin connection. Now it used to connected to a male 2 pin then to a 2 pin Molex connector (hope your able to follow this :/ ) The only problem is when i was changing the molex connector covers for UV ones It some how 'did' something and wouldnt work any mroe once i connected it all up. Anyway, I cant find a 2 pin (too) a male molex connector anywhere on the net. All i can find is a 3 pin to a molex. I have a spare 3 pin to a molex and it fits into the female 2 pin (with one pin left over) :/ Will this work just the same? (ill put electrical tape around the spare Pin Ofc) Or is there anywhere on the net that sells them?:( thanks for your help :) Adam.