ello m8 check the lenth of the legs coming out of the cap normally one is longer but for the life of me i cant remember weather longer or shorter is pos. i will have a hunt about and get back to you.............. after a quick search shorter leg or a line/arrow on side of the cap denotes the negative leg on a cap as shown on this little link
http://www.wjoe.com/capacitorinfo.htm
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Nathan Ralls HPI, Custom Blitz,
www.piraterc.com mr-o foams
woop woop racing officialy keeping team toe out inline